Definitions

1. adjective

strangely or unexpectedly amusing; quirky; eccentric.

“The wacky comedian had the audience in stitches with his outrageous antics.”

2. noun

a person or thing that is considered eccentric or quirky.

“The wacky artist’s installation was a hit at the museum.”

3. verb

to behave or seem eccentric or quirky.

“The kids were wacky at the amusement park, screaming with excitement.”