English · Slang Attested

mouthbreathing

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

Meaning · English

unintelligent, especially when not aware of this

⚠ Register: derogatory, slang

Where it’s used: Used American English

Sources & notes

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

Common questions

What does “mouthbreathing” mean?

unintelligent, especially when not aware of this

Is “mouthbreathing” formal or informal?

mouthbreathing is generally derogatory, slang.

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