AllieBug Share definition Flag A term refering to an amazing girl and wonderful best friend. Cutest thing you'll ever meet. Anyone who happens to date an AllieBug should consider themselves lucky. Wow, AllieBug, how'd you get to be so amazing? AllieBug by N8ofdeb8 February 21, 2011 0 0 Get merch Get the AllieBug mug. Buy Now — $32.95 See more merch