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 March 1, 2009
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Did you see that movie? That was some FAS!!!
by the_lil_feisty_one July 26, 2006
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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
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Stands for "Fat Arm Syndrome"

A person with more than necessary arm fat.
by Lorla April 16, 2008
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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 22, 2009
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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 May 31, 2011
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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
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