Originated from youtuber Daniel Howell's video "Would You Date The REAL Dan?" where he signed up for tinder. He asked someone if they liked memes in which they responded with "what's a meme lol"
Dan: so anyway how do you feel about memes?
Pernille: what's a meme lol
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi