factorial - Short for shit factory, it's a lazy, worthless, good-for-not

Short for shit factory, it's a lazy, worthless, good-for-nothing person who just takes up space and breathes in your general direction.

That guy is a factorial, he sits in the corner and stares at the wall like it owes him money.

She’s a factorial and still manages to make the whole room look worse.

He’s a factorial, and he’s got the attitude of a man who’s been fired 10 times.