1 definition by valvenus

Top Definition
The act of making up an excuse, such as babysitting, to get out of doing something else.
Me: Hey Katie, do you want to come hangout?

Katie: Ummmm no I can't. I have to uhhh, babysit my sister.

Me: Maaan, you ain't babysitting, you're bullsitting!!!
by valvenus November 23, 2011

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