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the act of shoving your thumb up someone's arse.(butt hole)
this is commonly done as self defence and is often followed by a rear naked choke.

wrestlers call it "checking for oil"

porn stars call it "the thumb blast"

*the term was coined in MMA fighter Forrest Griffin's book, "Got Fight?".
I'm not afraid of that bully, he won't be able to stand my "asian dart".
by Mykel Warick April 19, 2010
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