In Modern Warfare 2, a person or group of people who use Tactical Insertions to their advantage, go to a rarely-used place on a map, set the insertions, then continuously kill each other to get a free nuke or a bunch of free headshots. This is considered complete and utter cheating and is commonly rejected by professional players. MW2 pro "Sandy Ravage" has a series on YouTube called Booster Justice which is him killing boosters to no end.
by SOTE Czar July 28, 2010
by HighRoller_9 January 04, 2008
Online gaming: A person who sets up a secondary account which they use playing with a rival team. They help the rival team to lose, thus contributing to the progress of their primary team.
Blaze: WTF!? I just got killed by a guy on our side!
Silentsword: Kick him from the game! Get a life you fucking booster!
Booster: haha! You got owned! Your side sucks ass! You should join us!
Silentsword: Kick him from the game! Get a life you fucking booster!
Booster: haha! You got owned! Your side sucks ass! You should join us!
by Broadsword April 23, 2009
Someone who never buys breakfast, lunch or supper. Or even the odd beer for the fellas.
See Fred White
See Fred White
by Leon Turgeon February 17, 2011
Person 1: Lets go out to eat!
Person 2: Okay, sounds like a plan!
*before leaving*
Person 2: I'm about to pick you up.
Person 1: I don't want to go anymore.
Person 2: You're such a booster.
Person 2: Okay, sounds like a plan!
*before leaving*
Person 2: I'm about to pick you up.
Person 1: I don't want to go anymore.
Person 2: You're such a booster.
by Anabsj January 06, 2015
by not a hexbug girl April 03, 2019
when a guy gets led on by a girl, thus boosting her confidence up, so she can get with another guy who shes likes as well in the process.
Stacy: "Frank, i like you and youve made me feel really special, but i think a like another guy more. Therefore we should only remain friends"
Frank: "Stacy, i really liked you. thanks for using me as a fucking booster. Whore"
Frank: "Stacy, i really liked you. thanks for using me as a fucking booster. Whore"
by AAACCCCCHHHHILLLLEEEUUUSSS February 04, 2009