Top Definition
Fnis derived from a country in Europe called Denmark. First spotted on the streets in Madison, Wisconsin early in 2005. Used as a noun. Somewhat like a dime.
Only the pimpest of players use this term.
See also... Hottie - Dime
1. "Damn man! Did you see Eva today?! She's such a fnis"

2. "Eva, oh my god, look at Chrstian! Walkin' up and down the halls like a true fnis."
by schmidt February 17, 2005
comes from (F)ucki(N)' (I)nsane, comes from a switch in Symantec Ghost and pretty much does nothing... hence its fucking insane.
person #1:Dude did you see that guy get hit and run over like a rabbit?

person #2:yea man, holy shit that was FNI!
by t3h-0wnz0r February 21, 2005
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.