It's a Kenyan slang term for a chick involved in a one night stand .The guy never calls her after.
Most of the times she or they regret it later but still go on having one night stands.
Guy 1 : Hey ,remember the fine lass I was with last night ?

Guy 2 : Yes.How can I forget. You said you wanted to bang her bad.

Guy 1 : Well apparently I got some.Didn't even ask for her number.

Guy 2 : Nice!!! She's just a chips funga now....and in. some was...so are you.haha
by Brian254 June 10, 2014
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