a pick me
A pick me is someone who will say stupid things about their own gender just to get the attention of the opposite sex. They think it makes them look cool, but it just makes them look dumb.
She said 'All girls are fake' just to make a guy laugh at lunch.
He said 'All boys are f***ing stupid' just to impress his crush.
She told her best friend 'You’re literally the worst' just to make her crush look at her.