Common game for young males, "silly swords" involves using two (or more) competing streams of urine as if they were swords in a sword fight. Unlike a pissfight or pissing contest, urinating on the competition is never allowed. The urine stream is only used against the other person's stream, just like a sword fight.
Jimmy and Frank were in the back yard playing silly swords.
by Frank Klaune March 06, 2004