Synonyms and antonyms of Stupid ideas or behavior in American Thesaurus

stupidity (noun)

stupid behavior

madness (noun)

ideas or actions that show a lack of good judgment and careful thought

lunacy (noun)

stupid and possibly dangerous ideas or behavior

idiocy (noun)

very stupid ideas or behavior

insanity (noun)

informal very stupid or crazy behavior that can cause serious problems, harm, or injury

stunt (noun)

something dangerous or stupid that you do, often to impress someone

folly (noun)

formal a way of thinking or behaving that is stupid and careless, and likely to have bad results

idiocy (noun)

a very stupid thing to say or do

a mug’s game ()

used for saying that something is stupid or dangerous and you should not get involved in it

(going) down the rabbit hole ()

used for referring to a situation that is strange, confusing, or illogical, and often hard to escape from

craziness (noun)

the fact or condition of not being at all sensible or practical

make nonsense of ()

to make something seem unreasonable