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2.
a girl under or around 100lbs that is constantly being railed out. She doesn't care how large or how small the guy is, but she is a straight twig. She consumes minimum calories a day to keep her ribs from sticking out. These girls party hard and can make the bed rock. They are easily identified by their incredibly small ass to breast ratio.
"That girl is a twig, what a slam stick"
"No one likes slam pigs, I would much rather a slam stick."
by djprimo69 March 18, 2010
 
1.
the tubelike object that hangs between a man's thighs. Also known as a penis.
I gave her a mushroom tatoo with my slamstick.
by Chris Wagner January 18, 2003