Definition

Guaifenesin and Dextromorphan Hydrobromide (DXM HBr 30 mg).
Guaifenesin just helps loosen mucus and clear congestion and DXM is used to get hiiiggghhhh. =

Example Usage

try some of this mucinex its new its got 30 mg. getcha high

Origin

Urban Dictionary

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See “mucinex” in Corporate Speak, Gen-Z Slang, Pirate Speak, and more.

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