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1.
A term used when a person has totally owned something, or done really well. Usually used in reference to a test, sport, or other personal trial. The term can be reversed to imply failure.
"Dude, how did you do on that test?"
"I totally anally penetrated it, I got a 99%!!"

or:

"How was your hockey game?"
"Ugh, we lost 0-11, the other team totally anally penetrated our goalie!"
by Babisarous Sex February 17, 2009