Top Definition
Acronym for Imma Bitch Slap Yo' Ass. Generally used in situations wherein expressal of such feelings would be looked down upon, such as a school, in the workplace, or in public. Usually conveys truthful meaning, rather than just a joke.
Carolyn: WTF Rema?! Where is the work I asked for?!

Rema: Oh man, sorry, I was so shitfaced last night, I totally forgot to write that up.

Carolyn: IBSYA.
by Yttrim September 22, 2012

The Urban Dictionary Mug

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The Urban Dictionary Mug

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