English · Slang Attested

rattlecap

In real, traceable use. Part of the curated seed collection; community review is coming.

Both English Tiếng Việt

Meaning · English

An unsteady, volatile person.

Nghĩa · Tiếng Việt

người không ổn định, dễ thay đổi

Machine-translated — suggest a fix

Where it’s used: Used American English

Examples

I should write oftener but that my sister Sarah has become such a rattlecap, that she leaves me not a particle of news. Upon my word, she is the greatest talker extant. I am a perfect silence compared with her.

Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30)

Sources & notes

Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-07-30 via kaikki.org).

Common questions

What does “rattlecap” mean?

An unsteady, volatile person.

Is “rattlecap” formal or informal?

rattlecap is generally slang.

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