FAS

Fetal Alcohol Syndrome-caused by women drinking while pregnant. Results in having a retarted baby.

OMG, that Maddy girl was such a FAS baby today.

by FAS BABIES R TRIPY February 28, 2009

FAS

FAS = Funny Ass Shit

Did you see that movie? That was some FAS!!!

by the_lil_feisty_one July 26, 2006

FAS

fight after school; what potheads do when they are high

Alice: What's up with her?

Mandy: She's just worry because she has to FAS tomorrow

Pothead #1: Hey I wanna FAS

Pothead #2: ok man let's go!

by woohoo69 October 29, 2011

FAS

Fucking Awesome Syndrome. When someone is just so amazing that no other words can describe it, they have FAS.

Some dude at the party told me I have FAS! I've never been so happy in my life!

by Richard C. Mongler III July 25, 2009

FAS

Stands for "Fat Arm Syndrome"

A person with more than necessary arm fat.

"Can you see Mary's FAS flapping in the wind?"

by Lorla April 16, 2008

FAS

Flat Ass Syndrome. A bad condition where a person (usually a guy) has an unnaturally flat ass and makes their pants look like potato sacks.

Person 1: HOLY FUCK. That guy has no ass!

Person 2: I know! They must have FAS.

by lovely_cupcakes October 28, 2009

FAS

Finger Activated Stud: A guy that needs someone, usually his girlfriend, to finger his asshole in order for him to get turned on and achieve orgasm.

Tina: Hi Tammy, how's it going with your new boyfriend?
Tammy: Gosh Tina... I don't know about him. He's great, but he's a FAS.
Tina: You mean you had to finger his ass?
Tammy: That's right, and I think I lost one of my Lee Press-on nails inside him!

by jcrex July 19, 2006