Definitions by Bittersweetstarboy_

FillyFooler 

A homosexual (usually female) pony.

Friend1: hey! Did you know that Rainbow Dash is a FillyFooler?
Friend2: really? No way!

FillyFooler by Bittersweetstarboy_ July 10, 2019

FillyFooler 

A homosexual pony (commonly female), the word FillyFooler is mostly used in My Little Pony: Friendship is Magic fanfictions.

Friend1: Did you know that Rainbow Dash is a FillyFooler?
Friend2: Really? No way!

FillyFooler by Bittersweetstarboy_ July 10, 2019