fittison Share definition Flag (noun) A very handsome man. Variant of fitty (relating to men only), but even more so. Origin: possibly 'son of fitty'. Coined 2004 Rome. Look at him! He's a right fittison. fittison by AKH September 24, 2005 0 0 Get merch Get the fittison mug. Buy Now — $32.95 See more merch