Not cut out for it

Meaning

Unsuitable for a role or job.

Usage

Used when someone accepts a mismatch.

Origin & History

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

Tailoring metaphor for shape not matching.

Used widely in 20th-century English.