The term 'screw up' is a colloquialism used to describe an action that has gone wrong or been done incorrectly. The crossword solutions for this term include 'DISAPPOINT' (10 letters), 'MISCALCULATE' (12 letters), 'MISMANAGE' (9 letters), 'SPOIL' (5 letters), 'GOOF' (4 letters), 'BUNGLE' (6 letters), 'ERR' (3 letters), 'FLUB' (4 letters), 'MUFF' (4 letters), 'boner' (5 letters), 'BOTCH' (5 letters), 'ERROR' (5 letters), 'LOUSE' (5 letters), 'misdo' (5 letters), 'SNAFU' (5 letters), 'blowit' (6 letters), 'RUMPLE' (6 letters), 'BLUNDER' (7 letters), 'TIGHTEN' (7 letters), and 'MISHANDLE' (9 letters). All of these words can be used to describe an action that has gone wrong, been done incorrectly, or caused disappointment.