Sailors use this term in a derogatory sense with reference to others who are extremely useless. The fid is a device used by sailors to untie stubborn knots. This is the only application for this equipment, hence the derogatory connotation.
Ace: Wow champ really blew the big game last night, he ran the wrong way with 20 seconds left.
Gary: Yeah, that champ is a real fid.
By Ashly
Fid
abbreviation for Fuck It Dude! originated as a 'Get Crunked up saying' before Hart County Cross Country meets. just say F! I! D! to avoid geting in trouble