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A girl in your contacts willing to give you head.
Matt: She a booty call?
Peter: Nah, she a brain text.

by A Peter O August 10, 2008
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v. Sending a message without communication through ordinary channels.

n. A communication sent or received without actually calling, talking, writing, emailing or texting.
"Hello? That's so funny... I was literally just calling you... I must have sent you a braintext!"
by Ziggy_Susan March 29, 2009
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