Top Definition
a) To not lose to ANY competition on one's own home soil. (An Indiana Football Tradition)

b) to make a play and not be a weak dick.

c) to act like you have been there before and keep it real.
a.) The Indiana Hoosiers are going to defend the rock next

Saturday against Purdue.

b) He defended the rock last night and laid pipe.

c) "Listen buddy, we don't know anyone here. So we have to go in, pound an excessive amount of diesel and defend the rock."
by iLoveWAGS June 23, 2009
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