FSM 

Fat Stomach Man: a man with a fat stomach.

Look at that FSM eating a huge omelette!

FSM by SarahDup January 8, 2009

fsm 

FSM stands for Finger Slippery Moment. When your phone slips in the middle of something and you randomly dial/call/send an audio message to someone by mistake. It's a finger slippery moment.

Guy: Hey, saw a missed call.. you tryna call call or it's one of those finger slippery moments? lol
Girl: 🙈 fsm sorry

fsm by TPats September 11, 2019

FSM 

Fat Smelly Man or Fat Stinky Man

I went out on a blind date with a FSM! Ick!

FSM by jbonz April 30, 2007

fsm 

"For Sure Motherfucker"

Me: Yo wanna go out?
Bro: Fsm!

fsm by hhoes August 23, 2018

FSM 

1First Spinjiztsu Master
creator of the LEGO world Ninjago from 'LEGO NINJAGO'
FSM is commonly used when texting

Flying spaghetti monster
Weird ass cult worshippers

The FSM was one of my favorites in ninjago

We worship the FSM on tuesdays

FSM by erenyeagerfr September 1, 2023

FSM 

The Flying Spaghetti Monster: a god worshiped by one one and only true religion: pastafarianism
Legend goes one day he got drunk, and accidentally created the universe!

The FSM is the only true god.

FSM by SESgaming November 8, 2023

The FSM 

Short for the Flying Spaghetti Monster. The one true God, he is made up of a pile of spaghetti with two meatballs in it. Under his noodliness, the holy day is Friday, the preferred attire is Pirate garb, and the preferred head covering is a pasta colander. And instead of saying Amen at the end of a prayer, you say Ramen

The reason people are taller now is because The FSM shows his love by smacking people on the head with his noodly appendages, making people shorter each bonk. Now there are more people, so there are less bonks to go around, so people are taller.

The FSM by ScienceDude23 November 2, 2020