Top Definition
In multi-player games, having other people assist you in getting leaderboard position or achievements (xbox 360 specific) by having other people help you in ways that go counter to the game's design. Most often done with one team throwing the game to another.

Example: In Battlefield:Modern Combat, one Achievement acquired by hitting 5 enemies and 0 friendlies in one mortar strike. This is doable but, during normal play, exceptionally hard. Boosting would be getting 5 people you know to join the other team and all stand in one place so you could drop a mortar strike and get the achievement.
Getting to the top of this leaderboard is a joke. The only people on there did it by boosting.
by Ioshua August 22, 2006
Boosting is the act of smuggling drugs via rectum. usually in a plastic capsule.
As much as he hated it, Rob had no choice but boosting the coke in order to avoid it being detected at the airport by authorities.
by The Ego Killer August 13, 2010
Boosting is when you have a turbo car & you boost it by accelerating and it increases your speed twice as fast or more than if you had a naturally aspirated car. It's so much fun hitting boost & everyone looks at ya car when ya boosting it.
(Driving down the main straight of town & *Jamie yells out the window of his N/A Subaru RX)

"Stop boosting your car, it makes my lil 4 cyl rice burner look like a bagger".

(Me)"My car has boost, I can't help that Im constantly boosting it. It's fun!"
by Amanda572 January 22, 2008
To show off. To brag.
That kid is boosting with his soccer skills.
by Dorathy Todo September 25, 2006
To steal retail items and resell them on the black market.
Women/Men selling knockoff purses in the street are boosting.
by Goe September 13, 2015

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