f'darn Share definition Flag a word in between 'fuck' and 'darn' that's usually used when you notice a teacher walking up behind you in the middle of using the word 'fuck.' 'oww, f--' *teacher walks up* '...darn. f'darn!!' f'darn by scout29 May 15, 2010 0 0 Get merch Get the f'darn mug. Buy Now — $32.95 See more merch