Combination of the words "hammered", "shit-faced", and "wasted". Used to describe a state of intense drunken-ness, usually accompanied by asinine behavior.
Dude, I had a terrible week. I can't wait to get hammerfasted and embarrass myself tonight.
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.
"Quit being stupid before I knock you down and hammerfist your face!"
One who has sex and leaves immediately after, commonly known as a one-night stand, also a "hit and run" as an innuendo
"There are many species of sexual animals in this bar tonight. First there's the wall flower, then the emo-kid, followed by 'that guy' who thinks he can dance. Then there's the all night hammerdasher, watch closely as he stalks his next drunktarget."
1. Brooke was definitely Hammersharked during Shark Week because she kept her arms over her head like she had a fin and kept singing the Jaws theme song (dundun, dundun, dundundundun)