A huge wide grin worn by a complete asshole after he just fucked you over. See NHL player Jarkko Ruutu
Left D "Ruutu hit me in the groin last shift, what a dick"
Right D: "Yea that shit eating grin on his face makes me want to wipe it off with my skate blade"
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.
Buy the mug