merp Share definition Flag noun, adjective, verb, adverb. a word used when bored or have nothing to say. for anything and everything. Saisha "meerp... merp!" Jess "are you okay?" Saisha "merp" merp by swaagnitz October 27, 2011 0 0 Get merch Get the merp mug. Buy Now — $32.95 See more merch