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1 definition by imnotverywitty

 
1.
High Butt Crack Syndrome:
A medical condition in which, upon sitting, 3-4 inches of the victims butt crack are exposed. typically found in high school girls and the occasional middle aged fat man.
"that girl over there has some serious hbcs.."
"sick man."
by imnotverywitty May 06, 2008