The term 'off one's trolley' is an idiom used to describe someone who is acting in a crazy or irrational manner. The crossword solutions for this term include 'NUTSY' (5 letters), 'LOCO' (4 letters), 'INSANE' (6 letters), 'NUTS' (4 letters), 'NUTTY' (5 letters), 'DAFT' (4 letters), 'LOOPY' (5 letters), and 'BATTY' (5 letters) and 'BATS' (4 letters). All of these words are synonyms for the term 'off one's trolley' and can be used to describe someone who is acting in an irrational way.