1 definition by That guy over by the icecream

1: A way of saying that something is/sounds stupid. 2: A mean thing to call retarded people.
1: Ya that'll work herp a derp.
2: Haha, look at the herp a derp's helmet.
by That guy over by the icecream November 21, 2010
Get the Herp a Derp mug.