FY! 

internet acronym for "Fuck Yeah!"

(people often mistaken the "!" as an inverted "i" expecting it to be FYI or "for your information")

Dana : Seen that movie?
Ray : FY!
Dana : IKR?
Ray: :-)

FY! by Andrei "CodeCalibre" January 22, 2011

Fy! 

Swedish word meaning the same as "Fie!" in obsolete English. Like saying, "Shame on you!"

A Swedish mother will reprimand her naughty child by shaking her index finger at the child saying "Fy, fy, fy!"

Fy! by toddabearsf August 16, 2008

FY 

This textual acronym can either mean "fuck you/yourself" or "fuck yeah."

Example 1 (fuck you): FY YOU STUPID ASSHOLE.
Example 2 (fuck yeah): FY! SCHOOL IS FINALLY OVER!

FY by fhk x3 December 31, 2016

fy 

Short for fuck yeah.

"School is over forever!'
"FY, man!"

fy by the_grad June 16, 2005

FY 

"FY" is the abbreviation word for "For you ;)". It is used to show an unconditional and sincere appreciation for what someone just said to you by returning the same compliment. It always follows the word "Thank you for you".
Fun fact: "FY" is used a lot in Azerbaijan.

Pascal received presents from both of his friends during Christmas
Pascal: Oh wow, Christmas presents, thank you for you!
Julien: No, no, no, no, NO. Thank YOU for YOU.
Will: FY.

FY by Kazgrum December 20, 2016

FY 

Short for fuck you

Youre shit
FY man

FY by Spencer!!!!!!!!!!!!!! April 16, 2017

fy 

Short for "f**k you"

- Oops! Did I break it??
- FY, man!!

fy by Sam Star November 28, 2004