a) You do not know what the fuck you're meant to do with your life.
b) It sounds like you're about to say the word fuck.
c) It's very likely you're an alien that has escaped from Area 51, and has stole a phone from a humanoid and you're trying to figure out how to use its keyboard
Me: *Dies in a mission in GTA Online*
Also me: ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
Me in game:*dies*
Me irl:fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
You were hesitating saying the f word because someone was around that you did not want to hear you say it. But then you just decided to let it out.
me:*dies in video game*
also me: fffffffffffffffffffffffffffffffffffffffffffffffff...
my mom:*starts staring at me*
me: ffffffffffffffffffffffffffffffffuck.
That is when you use the word ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffuck
f
f
f
FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
f
f
f
f
f
ff f
f
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).