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A shortened version of "meat curtains"
Damn, Debbie needs bigger undiez, her murtains are hanging out.
by JAHY45 August 20, 2007
The uncool, cool kind of threesome in which a male inserts a double donger in his ass, and has sex with two women with both the forward and backward motion of his hips.
Oh man I totally murtained your mom and sister last night.
by Twomack July 28, 2009