A Spam is when you smack a
guy on the forehead with a
flat hand or preferably a fish while shouting Spam.
Can be played as a Spam
war, which is a version of Uncle but with spamming.
Random
Guy: Spam!
A
Random Spaztard: Oww! Now i'll tell my
mommy!
Or...
Random Guy: Spam War!!!
Random Guy's Friend: I'm never gonna say uncle!
1 Minute Later...
Random Guy's Friend: UNCLE!!!