Meaning of “crazy” - Learner’s Dictionary

crazy

adjective uk us /ˈkreɪzi/
STUPID

A2 stupid or strange:

a crazy idea
I was crazy not to take that job.
ANGRY

B2 annoyed or angry:

The children are driving me crazy (= making me annoyed).
Dad went crazy when I told him what had happened.
be crazy about sb/sth

A2 to love someone very much, or to be very interested in something:

Mia's crazy about baseball.
go crazy

to become very excited about something:

When he came on stage the audience went crazy.
like crazy informal

If you do something like crazy, you do a lot of it, or do it very quickly:

We worked like crazy to get everything finished.
crazily adverb
craziness noun [ U ]

(Definition of “crazy” from the Cambridge Learner’s Dictionary © Cambridge University Press)