Barnacle Share definition Flag A crass word used as a profanity in everyday lingo. Also Anna obscure sea creature that latches on ships and boats. Kyle: Did you hear what Matilda said? Luke: Yes, it was a load of barnaclesKyle: True that Barnacle by Booty is my specialty May 23, 2016 0 0 Get merch Get the Barnacle mug. Buy Now — $32.95 See more merch