Top Definition
When your butt hurts from geeting fucked in the ass a lot or real hard.
Person 1: I gave this girl a buttache last night. It was so funny, she couldn't even walk straight.

Person 2: I had a buttache when I woke up this morning. I asked my dad what happened and he said I fell down the stairs.

Person 1: You don't have stairs in your house.

Person 2: FUCK!
by J Mit April 07, 2005

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