duuuuuuuuuude Share definition Flag A slang term usually used by surfersand skaters. Surfer #1: Duuuuude did you see that wave? Surfer #2: Duuuuude duuuuuuuuuude by Joe September 3, 2004 0 0 Get merch Get the duuuuuuuuuude mug. Buy Now — $32.95 See more merch