crackers
adj.adj. silly, crazy, or acting in a strange way. You use this word in a lighthearted way to describe someone's behavior.
adj. insane or extremely foolish. Common in British English; often follows verbs like 'be', 'go', or 'drive someone'.
He must be crackers to go swimming in this freezing weather.
The neighbors think I am crackers because I spend all day talking to my plants in the garden.
While some viewed his business plan as a stroke of genius, others were convinced he had gone completely crackers for investing his entire inheritance into a single startup.
From cracker + -s. The South African sense is from their sound and its status as a plurale tantum by association with trousers. The adjectival sense derives from British naval expressions referring to firecrackers in one's head, originally as "he's got the crackers" and then "he's gone crackers" before the present "he is crackers".
Often follows linking verbs such as 'be', 'go', or 'drive someone'.
He is a crackers person.He is crackers.In this sense, the word is typically used after a verb rather than before a noun.