Synonyms and antonyms of To be, or to become crazy or stupid in British Thesaurus

be/go out of your mind ()

to be/become crazy or confused

lose the plot ()

to start behaving in a strange or silly way

take leave of your senses ()

to start behaving in a way that is not sensible or reasonable

go mad ()

to become crazy because you are so bored, upset etc

go nuts (informal)

informal to behave in a crazy, enthusiastic, or violent way

have a screw loose ()

to be slightly crazy

be going soft (in the head) ()

to be becoming silly or slightly crazy

need your head examined ()

to seem to be crazy or to be doing stupid things

be/go round the bend ()

to become crazy

be off your head ()

to be crazy

be/live in La La Land (mainly American)

mainly American to be silly or unreasonable

be off your rocker ()

to be crazy

go loopy (informal)

informal to become crazy

go nuts (informal)

informal to become crazy

lose it ()

to suddenly become unable to behave or think in a sensible way

lose your marbles ()

to become crazy

lose your mind ()

to become crazy or very confused

not know your arse from your elbow (British)

Britishimpolite to be very stupid

spit the dummy ()

to behave in a childish or unreasonable manner

stretch (verb)

to no longer be reasonable

take the biscuit ()

to be the most silly, stupid, or annoying thing in a series of things

trip out ()

to start behaving in a silly or uncontrolled way, often because you are frightened or worried