Combination of the words "hammered", "shit-faced", and "wasted". Used to describe a state of intense drunken-ness, usually accompanied by asinine behavior.
to hit something or someone with a closed fist in an overhand motion intending to cause damage, similar to the way a hammer is swung using the tricep muscle. Usually quick and repetitive.
Brock Lesnar landed some mean hammerfists against Frank Mir.