>>8653www.urbandictionary.com/define.php?term=Ironic%20WeeabooYou probably know the guy. The guy who thinks he's cool because he labels himself a degenerate. The guy who is "into" anime but is actually just a bandwagoner because their favorite instagram influencer posted a zero-two meme, but has no idea what to say when you ask what Yu Yu Hakusho is. And now he thinks he's ebin for wearing ahegao hoodies and following @hentai-memes-with-sound.
Unlike the other guy responding to you, I don't think it means "Anyone who got into it after me". I know enough people who aren't insufferable "memelords" and got into anime and such in the last two years, it just happens that most newfriends are exactly the type people are digusted by.