a game in which two or more people urinate into the same toilet at the same time, attempting to connect their streams, an imitation of the machine used in the 1980's movie.
Hey Jethro, I really gotta piss. Wanna play some ghostbusters with me?
by LastFog September 10, 2006
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to kid around, just kidding, joking
"yo chill son, im just gb'ing"

"gb gb"

"i fucked your mom...ghostbuster ghostbuster"

"i have aids...gb gb"
by Eddyson November 2, 2006
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The act of inhaling someone else's smoke rings
"I've been blowing good smoke rings all day!"
"yeah but Dude has been Ghostbusting them all day!"
by Brown_bear December 15, 2009
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Cops that try and stop people from ghost riding.

Dude, get off the hood of your car, here come the ghostbusters!
by yoje September 11, 2007
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When you ejaculate on someone's face and throw flour on it right after.
Crazy night. My girl let me ghostbust her-she walked out of there looking like Michael Jackson post-thriller.
by Ghostbuster;) April 4, 2017
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when you pop an old woman's cherry
After going to the retirement home, Steve became a ghostbuster.
by o-bit July 23, 2008
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