What is the meaning of Crazy?

Of unsound mind; insane; demented.

Out of control.

Very excited or enthusiastic.

In love; experiencing romantic feelings.

Very unexpected; wildly surprising.

Flawed or damaged; unsound, liable to break apart; ramshackle.

Sickly, frail; diseased.

Very, extremely.

An insane or eccentric person; a crackpot.

Eccentric behaviour; lunacy; craziness.

crazy, insane

Source: wiktionary.org