Meaning : Foolish. Totally unsound.
Example :
A crazy scheme.
Half-baked ideas.
A screwball proposal without a prayer of working.
Synonyms : half-baked, screwball, softheaded
Meaning : Possessed by inordinate excitement.
Example :
The crowd went crazy.
Was crazy to try his new bicycle.
Meaning : Bizarre or fantastic.
Example :
Had a crazy dream.
Wore a crazy hat.
Crazy meaning in Bengali (Bangla).