Top Definition
Yonam can stand for two things. They are both similar. Skater punk fags will tell you it means yo naked ass momma where others will tell you it means your nasty ass momma. Either way this word is very gay and I think might be the stupidest shit I have heard.

I didnt see it on here so I thought I would add it.
Tim: Hey man where we you last night?
Jon: I was too busy with yonam
Tim: ?
by Theonethatdoesnotsleep February 25, 2008
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