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playing Halo

1)making out

2)having sex in a dark room where you're not supposed to

3)hanging out with a member of the opposite sex under false pretenses of playing a popular video game
Wow, I can't believe Trevor and Dustin were playing Halo...they don't seem like that type.
playing Halo by Matthew Nomas January 18, 2008

Playing halo

To engage in the recreational use of marijuana.
Guy:"hey, i got my pay check from pottery barns, so i will be playing halo tonight"
Guy 2:"I'd love to, playing halo is the shizzletobisquitshit, are you hosting?"
Guy:"I'll host like always you scavenger"
Playing halo by metalanddrugs June 22, 2010

playing Halo

1. To hang out under the pretense of playing a popular video game for the purpose of making out or having passionate, lascivious sex.

2. A euphemism for a furtive romance, usually one centered around hot and dirty sex.

3. A common misspelling of Killing Aliens.
"The two of us cannot join your jovialities, as we are already scheduled to play Halo this evening."

"Where are Matthew and Melissa?" "They're playing Halo."
playing Halo by Timothy West May 16, 2008

“playing Halo” 

Parent - Hey son what were you and your friend doing upstairs?
Son - Ummm, we were just “playing Halo”.
Parent - Alright then.
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Brent: he just tossed me a slop grenade
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