H-factor
The gross girl who hangs out with the cool girls just to make them look better. She’s usually the worst one in the group. The H-factor is the one who makes everyone else look good, even if she’s a disaster.
The H-factor is like the human version of a trash can.
She’s the H-factor because she’s the only one who can make the rest of them look better.
She’s the H-factor, and she’s probably got cooties.