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The act of editing players and teams on your brand new sports video game (NCAA Football 09, NBA Live 2K9, Madden 09, etc.) and making every single attribute, of every single player on your favorite team, a perfect 99. Performed by a 99er.
Billy: I just got the new madden! Wanna come over and play me?

Tom: No way! I know you spent all night 99ing the steelers!
99ing by AA is god February 4, 2009
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I just straight up let him 99 me. What's 99ing?
99ing by FinalMac February 15, 2020
Related Words
99ing 96ing 996ing 9finger 9ing 9wing
96ing is when you and your partner sleep in a opposite parallel position, clothed, each facing outward to their respected sides In order to avoid all sexual contact with the other, what so ever, while sleeping and/or reposing in the same bed.
yes, bill and I were 96ing, it was the awkwardest not-fucking experience I've had since I was 16 trying to court various cheerleaders.
96ing by witionary April 29, 2011
1. to be tripping on nutmeg taken in pill form
2. to be listening to music by tech n9ne
nick: whoa dude...what the hell is happening?
hank: i dont know man, we 9inggg hahaa

adam: dude look at that car, its totally bumpin
timmy: i know man, can you hear those beats? they must be 9in
9ing by shophie December 22, 2008
opposite of a 69. Requires 2 people to rub each others anus towards the back of the person's head.
Tom: that 96ing positions felt akward last night

Karla: Yeah, the back of my head smell like poop
96ing by Crzycoco April 13, 2010
69ing, but for 96-year olds.
"OMG"

96ing
96ing by mynameisweeple November 16, 2011
when you and a sexual partner are both using a double sided dildo at the same time, ass to ass.
"damn bro, im never 96ing again, that made my ass hurt so much"
96ing by delibuns May 12, 2021