歪瓜劣枣 is a common variant of the standard form
歪瓜裂枣 (wāiguā-lièzǎo, 'misshapen melons and split dates');
劣 ('inferior') and
裂 ('split') are interchanged in everyday writing. CC-CEDICT marks this form as the colloquial variant. Both spellings carry the same meaning.