Top definition
1. similar to being "head over heels", but in a more sexual nature.

2. to think or speak of your significant other all the time, with hints at sexual inferences; mainly when done by women.

3. to let physical and/or sexual desires for a person overtake rational thought; to think with the booty instead of the brain.
Stacy: "I really love my boyfriend; he's so cute and funny and strong, he loves me and listens to me-"

Rebecca: "You just butt over brains for this guy aren't you?"
by Joppaberry Cocktail May 02, 2011
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug