Sexist Umpire

A last-resort term used desperately to insult a male who is defeating a female fairly and squarely in a debate or an argument. Popularized by tennis champion Serena Williams.

Carl: Ur mom gae.
Crowd: OOOOOOHHHHHHH!!!!!
Maria: Heyyyyyy... you're being a sexist umpire!!!
Crowd: Oof... shots fired
Carl: *retreats in order to salvage what dignity he has left*