A fat dan is someone that considers eating to be a hobby not a necessity, typically favouring fast food outlets such as krispy kreme. A fat dan does not actually have to be fat, they just have to be someone that looks like they should be fat and have a seemingly endless appetite.
The term can be applied to anyone and they do not have to actually be called dan, although it is usually considered more amusing if they are.
If someone ordersdoughnuts to be delivered to a pub it would be acceptable to refer to them as a 'fat dan'.
Definition- Fat Friday, also commonly referred to as 'Greeday', is the last Friday of the month where one can simply binge on any food one desires. Fat Friday is set aside for those who maintain healthy bodyweight on normal days and not for the continuously gluttonous or obese.
Fat Ernie 1) another name for taking a giant shit. One that is almost to big to come out and makes you feel hemmrodal and violated when it finally is pushed out.
Dude, I took a fat Ernie this morning and it feels like I blew out my o ring.