Mong-Boggle Share definition Flag Having sex with someone who suffers from a serious lack of intelligence/character judgement/personal hygiene. Dude, he was so desperate he went for a Mong-Boggle. Her IQ was 67 and she smelled of old-people. Mong-Boggle by Welsh Boyo. Aye. February 1, 2010 0 0 Get merch Get the Mong-Boggle mug. Buy Now — $32.95 See more merch