f4$

Flame for cash= very gay site.

ruthless=gay member of F4$
get it?

by yo bitch wut up July 12, 2003

F4

It is used on roblox as to say "the fuck" and is mostly used on gacha online.

*see something weird*
Person: F4 was that?!

by AYwassupbabagrill June 19, 2022

F4

a button on the keyboard in between F3 and F5. when button is pressed at the same time with the "alt" key windows on the screen go away really fast.

A: dude press alt-F4 to get tons of cash.
B: oh awesome thanks.
~B has quit the game~
A: sucker

by Briam September 1, 2003

f4

A crying face on the game "Maplestory"

Person: I'm so sad! f4

by MaplestoryPlaya September 23, 2009

f4

F4 is the key in between F3 and F5.
(Another definition)
F4 is fuck. people say F4 to bypass Roblox's Tags or etc.

Guy 1: Do you like grapefruits?
Guy 2: F4 no!

by JamezIsDaLozer April 6, 2022

F4

One less of f5.

by qwertyuiopasdfghjklzxcvbnm November 8, 2003

f4

In Natural-Selection (HL-modification) the F4 key when pressed, takes you out of the game and into the ReadyRoom, where you can choose to join a team or just jump about. When one team is getting completely wiped out, Some players may call out for the others to "F4!" as a way to end the game early, and sometimes, to deny the opposing team a victory.

they Have Skulks! F4! F4!

by Supernorn2000 January 24, 2004