A phrase used to describe someone or something stupid because "dick hammer" insinuates a device used to hammer dicks and thats a pretty stupid thing to have.
I can't believe Jane lit a firecracker in her cooch and burned her gooch...she's about as smart as a dick hammer!
Santa gave you a shake weight!? That thing is as useful as a dick hammer.
A small lap dog, usually from Mexico that will nest on your cock to keep it warm. You must be carful because on a bad day they can become dick stompers.
Unc: Steve have u seen my dickwarmer?
Steve: I think I saw it running around the kitchen