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similar to brain freeze, but refers to ones anus. its when you get up in the middle of the night to shit only to realize that the toilet is so cold the shit you are taking freezes your asshole shut. butt freezes can be brought upon by others, however, like doctors. if you have a big wart on your cheeks, the doctor may freeze it. the expression "that shit was COLD MAN" is derived from butt freeze, but is used to compliment an insult.
P1 (walks to toilet...) "owwwwwwwwwwieeeeeeee butt freeze!!!!!"

P2 (in next stall) " WHAT THE FUCKLEBERRY!!!
by squeakmighty July 12, 2009
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