look up any word, like hipster:
 
1.
ass or brains is another term for heads or tails - ass being tails and brains being heads.
ok were going to flip the coin .. call it .. ass or brains ?
by Spitts Mcman May 26, 2011
3 2
 
2.
ass or brains is synonymous with heads or tails. ass is tails and brains is tails
ass or brains is asked while(or before) a flipping the coin, you ask ass or brains, and if the coin lands on "heads" its brains.. and if it lands on "tails" its brains
by spitts mcman October 07, 2011
0 1