noun

1. An insane or eccentric person; a crackpot.

2. Eccentric behaviour; lunacy.

Synonyms: lunatic, mad man, nut ball, nut case, nutso, psychopath

adjective

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

2. Sickly, frail; diseased.

3. Of unsound mind; insane, demented.

   “His ideas were both frightening and crazy.”

Synonyms: deranged, loco, nutso, zany, nutso, off the chain, insane

adverb

1. Very, extremely.

   “That trick was crazy good.”