Your friend offers you one more glass of wine on a Friday evening. You know you shouldn't but FIF (Fuck it, it's Friday).
by JohnnyQuestisgay November 12, 2011
Get the FIFmug. This is a word used when someone else does something stupid. When the person does something stupid, you put your hand on his/her neck and slide it off fast, or if someone does something really stupid you give them an uber fifs, when you include some fingernail in your fifs and that makes it hurt a little.
by Harry2317 December 25, 2007
Get the fifsmug. by YoungGranny January 1, 2020
Get the FIFSmug. by Pratikthefreak December 16, 2016
Get the FIFmug. by natté April 19, 2005
Get the fifmug. 
