Josh says:

Woah, calm down internet tough guy! If this is such an issue, why are you even here, making the effort to comment? Get a life indeed, right? Spending yours being angry at people you'll likely never see again!

Besides, Charlie would be right about the Mullet -haircut-, but not exactly the pants. It's what "business in the front, party in the back" implies.

It's business in the front because it's a nice-looking cut. It's a party in the back because its long and unkempt.

Likewise, these pants are like a mullet because they're conservative and normal-seeming on the front, but short and more casual in the back.

See? It isn't just semantics, it's an allusion to the meaning behind the haircut, not the shape!

See, isn't it fun to think a little before making unruly comments~