Baso Share definition Flag Youth slang originating in the ends of Smithdown Rd, L'pool when 'basically' is just too long to say 'You're a baso bitch', 'Did you go to that house party last night? It was baso WHP' Baso by Langton Rd Massiv November 30, 2016 0 0 Get merch Get the Baso mug. Buy Now — $32.95 See more merch