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3.
tracksuit bottoms with elasticated waists, designed for the more overweight. they are popular in ireland with knackers, and D4s, who wear them stuffed into Ugg boots or Dubes.
Knacker: Alri anto, nice fat man pants ya got on der
Anto: Fuck off ya bleedin homo
___________________________
D4 1: Oh ma god babes, totally got myself a pair of fat man pants yesterday.
D4 2: ooooh babes! where?
D4 2: im too embarrassed to say babes. its like a total fucking descent into lower class. but there is a recession on..
D4 1: where did you get them babes?
D4 2: *blushes* Dunnes Stores.
by fatmanpants November 30, 2008
 
1.
Fat Man Pants are an informal variety of trousers intended for comfort or athletic purposes. Often worn by students in college from mainly American branded shops.
John: I'm sick of these jeans, might lash on the old fat man pants later.
Buckley: Ah good idea John. My mother packed my bag so I don't have fat man pants with me.
by Surfingarbo June 08, 2010
 
2.
Fat Man pants are elasticated, comfortable trousers worn by the more gluttonous members of society. They stretch, they're comfortable and supply a beautiful breeze whilst wearing them and going commando simultaneously. They can be worn at all events and weddings are often frequented by fat men in fat man pants.
Ricey: You hitting club trax tonight?

The Cardinal: Aye, coming straight from a wedding

Mad-fuck Hanna: Club Trax in a tux?

The Cardinal: Obviously not, I'm hitting it in my burgundy fat man pants and straw hat.
by CommanderFatManPants July 24, 2010