Iceboy
An iceboy / ice boy is a broke guy who drinks with guys who have money (usually guys he grew up with). They send him around to buy ice, open the beers for them and do all crazy things because he does not contribute financially.
Don't be fooled by all that alcohol he is carrying, he is just an iceboy and not the moreki.
Nyatsi
A nyatsi is a woman who is dating a married man. Sort of the same as a side chick.
No one:
Daily Sun: Korobela chased my nyatsi.
Main Chick
The girl who is in a serious relationship with a guy, but that guy is casually dating other people (side chick).
I don't care what he does oksalayo I am the main chick.
Side chick
A side chick is a girl that is being dated by a guy who is in a serious relationship with someone else (main chick).
The girl he was with is his side chick.