An extra flap of skin hanging off of the penis possibly containing puss.
Scott has a penis-sack.
by Leagerlog May 04, 2009
1 more definition
Where a whole bunch of dudes get a paper bag and put their dicks in the bag while jacking off.
"Hey bros! We should stop playing gamecube and do a penis sack."
by Teamrubert July 12, 2008