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1.
The act of a man (or woman) going down on a female sexual partner.
When George went down on Susie, it was a pink-out.

He gave her the best pinkout of her entire life.

Boy 1: What did you do last night?
Boy 2: I pinked-out.
by Lolzerz0101 October 05, 2010
 
2.
When a dog gets an erection
Did you see Joe's dog pink out when he humped sue's leg?
by AJ19692002 December 01, 2007
 
3.
Passing out during sex. Usually caused by heavy drinking.
Dorothy told us she has a tendency to pinkout when she thumbguns
by VERG January 04, 2009
 
4.
Similar to a blackout (alcohol related amnesia), except the temporary amnesia is caused by vagina, rather than alcohol or drugs. The primary symptoms of a pinkout are poor judgment and bad decision making.
John: Dude, next thing I knew all her stuff was moved in to my apartment! I don't even remember saying ok to that! I must've been in a pinkout or something...

James: I have no idea what she put up there...she was so hot, I would've done anything. She's a pinkout inducing machine!
by nearly civilized November 07, 2011