It's pretty hard now to appreciate Clerks in the context that made it great for its time. Kevin Smith is like the M. Night Shamalan of fat nerd directors, and Clerks is his Sixth Sense.
I never got the whole Kevin Smith fan defense of "well you may not think much of his films but he's a great public speaker and humorous essayist!"
I mean, I suppose that's true if you enjoy listening to or reading rambles peppered with dick jokes, Star Wars refs, how much fast food the guy consumes or constant reminders of how hot his wife is and how he can't believe she's willing to fuck a big fat fuck like him.
Jorts + sports jersey is the fat man's best look. The generous cut of the jort hides the male fupa and gut behind what appears to be just a huge pair of shorts while the billowing legs prevent thigh chafing.
The sports jersey associates the wearer with professional athletes such as NFL linemen in a subliminal suggestion that in addition to being as fat as a nose guard, the wearer is as athletic as one.
It is the perfect combination of physical and psychological camouflage.