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.
Made popular in the youtube sensation "Drinking Out of Cups," Johnny Hammersticks is someone who is hammerin' away like he's fuckin Tommy Noble, a famous boxer.
A: Heard you guys havin sex last night.
B: Yeah I was hammerin' away like Johnny Hammersticks.
A: Got it goin like Tommy Noble or somethin.