Definitions by Sabbath Dawn

boyc 

Short for Balls on Your Chin (implying you are, or were, performing felatio)

You were really drunk at my birthday party last night ! BOYC

boyc by Sabbath Dawn November 19, 2015

mnoyc 

My nuts on your chin

I'll bet you were happy. Happy with MNOYC.

mnoyc by Sabbath Dawn November 19, 2015