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When a person is being silly, rude, sassy, and or makes a small mistake. Usually used after a person name.
*tickles the back of neck*
" OMG! Jacob, ya booty crinkle! you know I'm ticklish"!

"Dude! Brandon totally screen peeked that time! That booty crinkle better watch his sweet ass next time"!
by _INSERTNAMEHERE_ February 11, 2015
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