FSFIL

Future Step Father In-Law

Yeah, he’s my FSFIL

by Confused redditor April 21, 2020

fsfs

fsfs is basically saying for sure for sure😂.

person 1 “aye you trynna link“
person 2 “fsfs”

by dxliaaa.🤍 May 1, 2020

Fsjseminarunlust

The unhappy feeling you get before heading off to your FSJ seminar.

My Fsjseminarunlust is really hitting me hard right now.

by JoKa22 July 26, 2020

FSimp

A simp that is a female

Katia is a FSimp

by rennoC0110 July 28, 2020

fsdafds'd

If you fsdafds

Kahoot just fsdafds'd my name... great job.

by helpmepls11 September 11, 2020

FSR

Fatigue Stimulus Ratio

The FSR can be high when workouts are very fatiguing and stimulating.

by iwantthegymback2020 September 14, 2020

fssj

fssj is the weaker version of ssj and gets you really pissed off to get it u must be near death.

my dad went fssj because i did something.

by man man >:) October 30, 2020