le me derpin Share definition Flag A phrase that describes a particularly retarded face: A retarded smile, and the eyes pointing in different directions. *le me derpinMom: What are you doing?Me: I'm derpin. See my derp face? le me derpin by derpette123456789 April 29, 2012 0 0 Get merch Get the le me derpin mug. Buy Now — $32.95 See more merch