Hello, I'm trying to complete a research about words used in some West African countries. I still have difficulties trying to find the meaning and sources of some words, maybe the froum could help me? the following are supposedly words used in Nigeria:

What's up? = irresponsible

wheater man = poor man

waka about = one who is always on the road

small wife = second wife in a polygamous relationship

bambam = buttocks

drug = any food supplement

If you have any sites or sample sentences for me I would very much appreciate it!!! Thanks!