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2.
something you get called if you happen to be a "beatoff" or "jerkoff" or "dickbeater" hence POUNDOFF....distant cousin of such...
God your such a poundoff Joe, why would you punch that old lady?
by Chriscrete February 23, 2008
 
1.
Male masturbation. Popularized in the Christmas special of "It's Always Sunny In Philadelphia."
"Sew me into the couch. I hide in there all the time to catch Charlie pound off."
by FlipFlipFlipadelphia March 15, 2010