see you in cornwall Share definition Flag It means "Goodnight" British/Cornish Slang jim. I'm going to bed matejohn. alright matejim. see you in cornwall john. ahh goodnight see you in cornwall by see you in cornwall March 27, 2017 0 0 Get merch Get the see you in cornwall mug. Buy Now — $32.95 See more merch