Blemish

Blemish is slang for a flaw or imperfection.

A blemish refers to any mark, spot, or defect on something that affects its overall appearance or quality. In slang usage, it can also be used to describe a person’s physical imperfections, such as pimples or scars.

Example 1: “I can’t sell this shirt, it has a blemish on the front.”
Example 2: “She’s beautiful, but that small scar on her cheek is the only blemish on her face.”