derpojack
An awkward, foolish, or bumbling person who is also rude or otherwise socially offensive; a derpy jackass.
John: Your dick is so small, only your mum will let you f*** her.
Bill: Wait, what? You and your mom? Really? ROFL, you're such a derpojack!
Bill: Wait, what? You and your mom? Really? ROFL, you're such a derpojack!