Top Definition
another way to say yes, or agreeing to something.
Adam- "Did you round that bases with that chick last night?!"
Ryan- "YERP-A-DERP!"
by A.B.S15 May 08, 2008
its a form of saying "whats up?" or agreeing to something.
adam: yo Ant, you going to the party?
Anthony: Yerpaderp.
by RAndomking14 April 15, 2011
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