Someone who is obese or overweight. It can also be used to insult the non-obese/overweight when insults are on short supply.
Jake; he's a fatty.
ayon kay Ryan ika-06 ng Abril, 2004
a big butt
you got a FATTY girl!
ayon kay babyboo ika-15 ng Abril, 2003
Another name for a blow job. (Said mostly in New York)
"Bro, that girl gave me a fatty!"
ayon kay DannyUCF ika-28 ng Mayo, 2007
a really fat dude, ppl that you don't like, someone you want to fight.
What FATTY?!? Wanna box?
ayon kay leslie ika-03 ng Marso, 2005
Unattractive people who will never grace covers of magazines ( except fat people magazines) nor be professional athletes.
Look at that hot, voluptuous fat stripper. "Hey fatty, bend over a little more and I'll spot you a 10".
ayon kay Dick Splash ika-10 ng Nobyembre, 2003
A title resembling Lord or Sire when preceeded by "Witty"
Witty Fatty, you have returned from your quest to the fridge.
ayon kay fatty ika-24 ng Pebrero, 2003
He's not good enough for you, but he acts as if he's too good for you. If you need a visual: roll around in bed with 20 lbs. of jello.
Fatty, you are lame, Brian if you lived in Eden.
ayon kay Fatty stole my candy ika-10 ng Hulyo, 2008