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1.
Crude way to reference a boner.
That last SI Swimsuit edition gave me a total skin tent.

I can't stand up due to my skin tent.
by Polarift March 20, 2013
 
2.
When a male loses a considerable amount of weight, a large flap of skin forms at the lower abdomen, often hanging below the pubic region. When the male achieves an erection, it may push up the loose skin and form a skin tent.
Mr. Flopnuts got a skin tent when Jake Locker bent over in football tights.
by fritz88 April 24, 2010