A slip of a boy, girl, etc.
Definition 1 of 1

Implied Youth
Indicates the person is not just young but suggests a sense of vulnerability or inexperience.

The job was overwhelming for a slip of a boy fresh out of school.
Physical Smallness
Emphasizes the person's small, thin, or delicate physical appearance, often invoking sympathy.

A slip of a girl, she moved through the crowd almost unnoticed.
Colloquial Usage
Used in casual conversation, not in formal writing or professional contexts.

Back in my day, I was quite the athlete for a slip of a girl!
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