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
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