Another name for Friday, the last day of the working week. Called this because Friday is the day for chasing fur (see definition by tdogg).
D-Mac: Hey Stevo, glad it's firday?
Stevo: You know I am. Going to the 'stang tonight?
D-Mac: Nah, last time I went there I got too hammered and lost my camera phoney.
D-Mac: Hey Ben, did you go to the 'stang on Friday?
Ben: Sure did, had a few Black Ices, got out the camera phoney, said hi to Artur, and did a pentathlon.