Definitions by Uthislith

Herpy Derp Day 

Sarcastic synonym of 'good job' or 'nice one'. Obviously can also be used to wish someone happy birthday, but generally the term is derogatory.

Person 1: I didn't wet the bed last night!
Person 2: ...Herpy Derp Day to you.

Herpy Derp Day by Uthislith December 5, 2011