Kiswahili. Updated November 2026. 5 min read.
Say 'Mambo?' to a Nairobi twenty-something and you will get 'Poa' back with a grin. Say 'Niaje, msee?' and the grin gets wider, because a visitor has just spoken Sheng, the city's own slang, and nobody expected it.
Sheng is Nairobi's street language: Kiswahili grammar carrying English, Kiswahili and mother-tongue words that have been bent, clipped, borrowed and invented, then remixed constantly by young people, matatu crews and musicians. The name is usually explained as a blend of Swahili and English, and its roots are usually traced to the working-class estates of Eastlands in the mid twentieth century. Today it is heard across Kenya on radio, in advertising and in music, though Nairobi is still its capital. This page gives you 20 words and phrases that are well established and widely understood, plus the matatu vocabulary, with honest notes on each and on when not to use them.
One warning first. Sheng changes fast. Words rise with a song or a TV show and fade within a year, different estates have their own versions, and anything a website tells you is cool is, by definition, slightly behind. Every word below has been around for years and is understood well beyond Nairobi, but young Nairobians may still laugh at your choice, kindly. We review this page regularly, and the date at the top tells you when we last did.
20 Sheng words and phrases
| Sheng | Meaning | Notes |
|---|---|---|
| Mambo? Poa | What's up? Cool | Long-standing and universal; mambo is also standard Kiswahili |
| Niaje? | How's it going? | Long-standing, and very common among people under forty |
| Sasa? | Hi, what's new? | An everyday Nairobi greeting; reply poa or fiti |
| Uko aje? | How are you? | Common; aje is Sheng for 'how' |
| Fiti | Fine, good | From 'fit'. 'Niko fiti', I'm good |
| Msee, wasee | Guy, person; guys | Very common; from mzee, an elder |
| Manze | Man, dude (an exclamation) | Long-standing: 'Manze, kuna jam!' Man, there's traffic! |
| Buda | Dad, or an older man | Common: 'buda yangu', my dad |
| Mathe | Mum | Common, said with affection |
| Shosh | Grandmother | Common; from the Kikuyu word for grandmother |
| Keja | House, home, room | Very common: 'niko keja', I'm at home |
| Ocha | Rural home, upcountry | Common, especially at Christmas: 'naenda ocha' |
| Tao | Town, the city center | Very common, from 'town': 'naenda tao', I'm going to town |
| Ganji, doh | Money | Long-standing; doh from the English 'dough' |
| Mbao | 20 shillings | Long-standing; heard every day at matatu stages |
| Kuomoka | To make it, to come into money | Common: 'ameomoka', he or she has done well |
| Rada, form | The plan, what's happening | Common: 'Rada ni gani?' or 'Form ni gani?' What's the plan? |
| Beshte | Best friend | Long-standing, from 'best' |
| Kubonga | To talk, to chat | Long-standing; the same bonga you see in Safaricom's Bonga Points |
| Noma | Intense: great or terrible, depending on tone | Common: 'Ni noma!' It's wild! |
Notice how many are English or Kiswahili words in new clothes: msee from mzee, beshte from best, tao from town, fiti from fit. That is how Sheng works. The grammar stays Kiswahili, so 'nimeomoka' (I've made it) and 'tunaenda tao' (we're going to town) take the same verb endings you would learn in a Kiswahili class.
Matatu Sheng
Matatus, Nairobi's privately run minibuses, are where Sheng lives loudest: the crews compete for passengers, the music is loud and the paintwork louder.
| Word | Meaning |
|---|---|
| Mathree | A matatu |
| Nganya | A matatu with custom art, lights and a big sound system |
| Makanga | The conductor, who collects fares and calls the route |
| Dere | The driver, from dereva |
| Stage | A matatu stop |
| Nishukishe hapa | Drop me here (standard Kiswahili, used by everyone) |
| Kanjo | City inspectors, who chase hawkers and matatus |
| Karao | The police |
If you ride a matatu (our Nairobi transport guide explains how), you only need two things: the name of your stage, and 'Nishukishe hapa' or simply 'Stage!' to get off. Pay the makanga in cash, or by M-Pesa where it is offered, and carry small notes.
How diaspora kids use it
For Kenyan families in the U.S., Sheng is often the first Kenyan language children pick up on a trip home, from cousins, and faster than any lesson. Kids raised speaking English in Houston or Minneapolis come back after a summer with 'niaje' and 'poa' and the confidence to use them. Parents sometimes find their own Sheng is a decade out of date and get teased for it, which is proof the language is alive. If your children are going home, a few words before they land help them join in, and their cousins will teach them the rest.
When not to use Sheng
- With elders. Greet an older person with 'Shikamoo' or 'Habari yako', never 'Niaje'. Sheng to an elder sounds disrespectful, however well meant.
- With police, immigration officers and anyone in uniform. Use English or standard Kiswahili.
- In formal settings: church, a school visit, a business meeting, a funeral.
- Outside Nairobi with older or rural people, many of whom do not use Sheng. On the coast, standard Kiswahili is a point of pride.
- When you are not sure. 'Habari' is safe with anyone, 'mambo' with people around your own age, and the rest is for friends.
Sheng, Kiswahili and Kenyan identity
Some teachers and parents worry that Sheng weakens children's Kiswahili and English, and the debate surfaces in Kenya's newspapers every few years. Others see it as a shared urban identity that crosses ethnic lines: Sheng belongs to no single community, which is part of its appeal in a country of more than forty. It is also the language of much Kenyan music, including the gengetone wave of the late 2010s, and you will hear it in comedy, advertising and on FM radio.
You do not need to take a side. Learn standard Kiswahili first, because it works everywhere, from a Lamu dhow to a Kisumu market, and pick up Sheng the way Nairobians do: by listening. Our Kiswahili course starts with greetings, and our guide to saying hello in Kenya covers the standard forms and greetings in twenty mother tongues.
Heard a word on your trip that is not here, or think one of these has gone stale? Tell us. This is a living page, and we update it.
