A guy that is lazy, usually gets laid every weekend, and loves to bang girls. He wants to be transgender and turn into a human of both sexes. He wants anal because his life is boring and he wants to "fill the gaps" in peoples life.
Based off several years of internet usage, the word most commonly refers to leftists who have committed the unforgiveable sin of disliking your favorite streamer.
John: Did you see the latest Douch debate
Erik: The genocide apologist who wants to abolish the age of consent? Gross, no.
John: Whoah didn't realize you were a fucking tankie dude