What is a fuckboy ? I don’t understand this sentence .... I watched a video in which they talked about a fuckboy ( I know what it means ) but I don’t understand the way they explained it . A fuckboy is a guy who leaves you unread , ghosts you and is probably online at Supreme. I don’t understand the last part “ is probably online at Supreme.” What’s this supposed to mean ? Is there anyone who understands it and could you explain to me a bit ? Thanks a lot .