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Fat /fat/ adjective, fat·ter, fat·test.
Disgustingly disappointing; not able to perform or behave in an acceptable manner.
Ex1: Dude, you're being fat right now by not coming to the show with us.
Ex2: Dude I was so disappointed with that performance; It was pretty fat.
Fat by SpiderBat :D August 22, 2011
Related Words
Fat fat ass father Fatima fatherless Fatty Fatneek fat fuck fat-e fathead
never call some fat boy or girl
fat by abbey b December 18, 2014
Mudassar is the official meaning of fat. It is used in the middle west. It also means that this certain mudassar person eats soooooooo much that, he is the reason for the starvation World wide. It can be used as a curse.
YOOO, wit dat big Fat booty, your such a Mudassar, BITCH!!!
Fat by Zakatulhada August 3, 2010
Among fans of certain 1960s-1990s bands (The Grateful Dead), used when something or someone is held in high regard. Don't know exactly what it stands for (I've asked), but Fine and Tasty, Fantastic and Terrific, Fabulous, Awesome and Tremendous would fit the bill.

Adj : From drug slang, so it may be comparing the thing or person to high quality marijuana. "Fatty" is used in the same manner.

Adj : In drug slang: a marijuana cigarette or joint containing high quality marijuana (possibly itself originating from the acronym FAT).
Those egg rolls are FAT!

We shared a FAT doobie and now I'm floating.
FAT by lu_b June 18, 2011
yesterday was awesome, i fat in really well
Fat by George Mccl October 28, 2008
Initials for Fit As Tit.
Similar to Fit as Fuck!
"That guy is FAT" said zara pointing to a goodlooking anorexic boy.
FAT by Jemmaaa May 16, 2006