Guy 1: Hey man why were you in there so long?
Guy 2: Sorry man, just firing up the old 50.
Guy 1: WTF? Dude, not cool, wait til you get home!
by the sweatdragon May 6, 2010
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A stentorian emission of flatulence.
Gosh! That was loud. Who's been firing up the brown engine?!?
by fo-sho July 23, 2005
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Similar to situation when shit hits the fan however structurally different. The outcome is not a shower of shit affecting everything nearby as in the first case, but a suddenly relaxed bottleneck behind a large amount of pressurised shit. This does not affect as many objects nearby but few heavily. (exchange "shit" with "issue" or "opportunity")
A: Where's John? Long time no see. B: He's gone. Shit got fired up.
by tomfx March 24, 2015
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When you pour red hots (candy) down your partner’s vagina.
Last night, I did the act of fire it up on that puntang!
by Bgibs November 14, 2018
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Central Michigan University saying said anytime someone sees another wearing CMU Gear. Often used in tandem with "Fire Up Chips". Often times it is used by students in Wayside or Okellies when they are trashed to the point of no return.
Fire up Gerry! I love your Central Michigan shirt. now lets hit up some shots of fireball!
by MichiganButinNC April 17, 2023
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