Kunyanduana – To have (casual) sex (Usually between two people that don't have a boyfriend-girlfriend relationship)
Word use: Eish! Timo ame nyandua Dori = Timothy has just had (casual) sex with Dorine

Chachisha – Confuse
Word use: Na si Marto alinichachisha nika hata bu ? = Martin confused me and made miss the bus!

Blanda – Make a (costly) mistake/mess up
Word use: Beste ya mine alichujwa janta juu ali blanda = My friend was sacked from work because of messing up

Oroso – Cross-country (sports) but really used to denote any long distance race (from 3000m)
Word use: Wakaleo ni wa noma kwa oroso = Kalenjins are very good in cross-country.

Boki – Boxing
Word use: Wangila alishinda Gold kwa Olympics ya Seoul = Wangila won Gold in the 1988 Seoul olympics

Blada – A strip of bicycle or car tyre tubing used in the making of a "Blada" game loop or in the making of catapults or for tying brooms
Word use: Blada yangu ni sparki poa ya kumake feya = This rubber has good elasticity for making a good catapult

Kible – To get drunk and sleep
Word use: Jana alikible kwa baesa = Yesterday he was drunk and slept in the pub