Origin:
The origin of this phrase is unclear, but it likely stems from the visual association of a "weak" chin with lack of strength and firmness. A prominent chin is often seen as a sign of strength and resoluteness, while a less defined chin can be perceived as weak or lacking.
Usage:
"Weak chin" is usually used in a negative context to describe someone who:
* Is easily influenced by others
* Avoids confrontation or difficult decisions
* Lacks the fortitude to stand up for their beliefs
* Gives up easily when faced with challenges
Example:
"He couldn't resist the peer pressure, he's got a really weak chin."
Note:
It's important to remember that this phrase is a subjective assessment and should be used with caution. Physical features are not a reliable indicator of someone's character or personality.