Hell yeah dude Share definition Flag A phrase (coined by Rory Donohoe) used as an alternative to the word "yes". Usually spoken in a joyful tone. EvBev: Boys we goin' Merrion? Dude: Hell yeah dude! Hell yeah dude by TopBoog June 22, 2016 0 0 Get merch Get the Hell yeah dude mug. Buy Now — $32.95 See more merch