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When you take a sentence or phrase that someone has said (possibly an insult) and twist it back around to insult or threaten them.

Sometimes extremely funny, other times extremly lame. Lame when you just switch the subject (Example 1) and ultra-hilarious when used against figures of authority (Example 2).
1. Cody: Henry, your entire family is gay.
Henry: No, your entire family is gay!

2. Mr. Kostick: Nate, move to the other side of the room. Leave Aric alone, he actually has ambition of passing this class.
Nate Godin: I have ambition of throwing a chair at your head.
Anthony: Good inversion, Nathan. (Not actually said)
by Anthony St.Pierre June 06, 2006
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2
a form of the alphabet where it is inverted half way through
therefore

a b c d e f g h i j k l m
z y x w v u t s r q p o n

so a=z g=t s=h

the result is always in capitals
with inversion colin becomes XLORM
by XLORM December 27, 2011
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3
When the penis, due to cold or extreme revulsion, retreats back into the body. An uber soft-on.
That Noelene bitch is so ugly she gave me an inversion. My dick's in hiding!
by CountFistula July 14, 2005
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