Top definition
ISF is Instant Skullf***, one of the best competitive Left4Dead teams in PC Gaming. They've performed in Newegg tournaments, Alienware, and gXl. Ranked in the top ten of Left4Dead teams in competition.
ISF just pwned our faces!
by sindrix December 11, 2009
Get the merch
Get the ISF neck gaiter and mug.
Oct 3 Word of the Day
I couldn’t care less (but one must keep up appearances, right?)
Frenemy has a family tragedy. "Thoughts and prayers."
by November 05, 2018
Get the merch
Get the Thoughts and prayers neck gaiter and mug.
Bobby Chong is looking to buy 2 doughnuts for 50 cents each. The cashier lady says that will be; a dollar seven total. Bobby Chong whips out the B.C(Bank Card), swipes, punches in the pin and waits for the thumbs up for approval then 3 letters in Capitals show up on the machine; ISF. Cashier shakes her head in shame and pitty. Bobby curses and walks away for the counter doughnutless; and realizes that he will never step foot in another Tim Hortons again due to ISF...$1.07 damn. How embarrassing.
by JNL January 11, 2005
Get the mug
Get a ISF mug for your coworker Abdul.
I'm So Faded
You know what IS-F from Lexus stands for? "I'm So Faded" Brah!!!!!!
by lcr49 July 22, 2009
Get the mug
Get a IS-F mug for your coworker Bob.
icky sexual feeling; the kind of feeling you get when something makes you uncomfortable to think about or see, i.e. incest, your English teacher naked, etc.
That creepy guy who works with me looked me up and down and said, "Nice shirt." and I got total ISF.
by Jocelynnn September 23, 2005
Get the merch
Get the ISF neck gaiter and mug.