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1.
Term used for a female who has so much sex that her pussy is no longer tight.
Guy 1: When i was fuckin' that girl it was like i was fuckin' a coffee can.

Guy 2: Yeah, i knew that bitch was a Loosie Goosie.
by Shellie Shel March 14, 2008
 
2.
a girl that has taken numerous poles in her lifetime.
Meghan is known as the loosie goosie of the school.
by Meghan M November 29, 2006