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The imaginary line between your girls vagina and ass that she won't let you cross during sex.
"I was trying to put it in her butt, but she wouldn't let me cross the mason Dixon line. "
by Ye Olde wordsmith October 11, 2015
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Jun 24 Word of the Day
An exclamation made when your friends or family are teasing you to a point where you can't handle it anymore and a hissy fit is in order.

Derived from a YouTube user's famed outburst following Britney's lackluster performance at the 2007 VMA's.
Sarah: 'OMG Susan, I can't believe you are wearing the same skirt as yesterday. Oh, and by the way, EVERYONE knows what you did with Kevin on the weekend. Plus you look a little fat, are you retaining water?'

by Billy Chickenhole September 15, 2007
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