What does "odd duck" mean?

An unusual person, especially one with an idiosyncratic personality or peculiar behavioral characteristics.

What is a synonym for "odd duck"?

Common synonyms include: eccentric, nutcase, odd bod, oddball, weirdos.

noun

noun ·Rare ·Advanced level

Noun

1
An unusual person, especially one with an idiosyncratic personality or peculiar behavioral characteristics. idiomatic
"This lad Kelley is an odd duck in many ways. . . . Unlike most college youngsters, he has no hobbies."

"This lad Kelley is an odd duck in many ways. . . . Unlike most college youngsters, he has no hobbies."