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1.
-noun

1. A waitress or waiter in the state of Arkansas, especially in the city of Little Rock, that unexpectedly shows you his or her ass crack while you are sitting eating dinner.
"Oh my god Patrick look at that!" That waitress just unleashed the Arkansas Crack-A-Saurus....
by ELGenerali February 17, 2010
 
2.
When the pudgy, slightly overweight, yet mildly cute waitress is helping the table next to you, bends over, her shirt rides up, and behold, 6 inches of ass-crack is staring you in the face.
Dude, did you just see that Arkansas Crackasaurus rear it's ugly head at the next table over?
by Jimmy Crack-a-lactic-a February 17, 2010