Porn Warn Share definition Flag The annoying messages at the beginnings of porn sites that ask your birthday, confirm that your 18, e.t.c... Man, last night Bill got all angry at a porn warn, and smashed his computer. Porn Warn by turd raft April 6, 2009 0 0 Get merch Get the Porn Warn mug. Buy Now — $32.95 See more merch