The meaning of CRAZY is not mentally sound : marked by thought or action that lacks reason : insane —not used technically. How to use crazy in a sentence.

Crazy can also mean behaving in a strange way esp. because of stress, as if you are mentally ill:

One who is or appears to be mentally deranged: "To them she is not a brusque crazy, but 'appropriately passionate'" (Mary McGrory).

If you describe someone or something as crazy, you think they are very foolish or strange.

CRAZY definition: mentally deranged; demented; insane. See examples of crazy used in a sentence.

CRAZY meaning: 1 : not sane: such as; 2 : having or showing severe mental illness

" Crazy " is a song written by Willie Nelson and popularized by Patsy Cline in 1961. Nelson wrote the song while living in Houston, working for Pappy Daily 's label D Records.