Top Definition
When a guy/gal drops a load with the magnitude of "2 Girls, 1 Cup," causing the the shitter to elevate off the ground, looking similar to the Old Faithful geyser of Yosemite National Park.
Chad: Yo man, did you hear about the Yosemite Geyser Shit Steve unloaded on his girl?
Brad: NO WAY MAN! how much air did he get?
Chad: He tapped the ceiling tiles, that's all I can say my man...
Brad: Good Old Faithful right there...
by Chad Bro Chill December 13, 2007
5 Words related to Yosemite Geyser Shit

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