Person 1: Hey, I wanted to talk to you about last night...
Person 2: Hey, you know what? BIYM! Okay? Last night never happened.
Person 2: Hey, you know what? BIYM! Okay? Last night never happened.
by K Wheezle May 25, 2004
Get the BIYMmug. BIYM stands for Balls. In. Your. Mouth. Its the perfect comeback and is always fun to use and say with your friends or even your parents.
by asherinalol February 17, 2022
Get the BIYMmug. “My newest Tinder hookup frequently verified with me that he wasn’t crossing any boundaries, and I was all for it; until, he mentioned biym. Not a fan.”
Or
Did the biym trick work with your boyfriend?
Or
Did the biym trick work with your boyfriend?
by Ibeliveinjustice January 8, 2020
Get the biymmug.