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Telling someone to nibble on or to eat the scrotum or the ball sack of another man.
Ian : Man you suck at call of Duty.
Mark : Hey Ian, Eat Sack.
by EatSackMan November 30, 2010
"eat sack" is a bastardization of "suck on my chocolate salty balls" which is a bastardization of "lick my balls bizatch" which is a bastardization of "give me oral sex, you african american whore."
Wh0re: hey nigga
Pimp: eat sack
Wh0re: fo'shizzle mai nizzle
by EnD3R February 14, 2003
sucks; is bad
Your mom died, thats eatsack
by Dolo December 17, 2003