Spanish word. Superlative feminine adjective of ugly. The superlative masculine adjective is 'feísimo'. This word is gramatically correct, unlike another word with the same meaning, in use: 'horriblìsimo' (bad grammar) In Mexico it is usual to say 'más feísimo (a)' although it is bad grammar.
Esa tipa está feísima, y su galán está más feísimo. (that gal is feísima and her boyfriend is more feísimo)