Top Definition
When a girl has gums (pertaining to the teeth) that are too large for her face to the point where they resemble a Great White sharks gums. Aka Miley Cyrus.
Bro1:Hey man what does Miley Cyrus have in-common with the shark from Jaws...

Bro2: I dunno.. I never thought about it..

Bro1: Bro, Miley-Mouth.

Bro2: What do you mean,"Miley-Mouth?"

Bro1: You know, where a girls gums resemble those of a Great White shark.. duh

Bro2: Oh.. like similar to the shark in Steven Spielberg's 1975 thriller; "Jaws?"

Bro1: Y.e.s. bro. Exactly.
by poefacekilla October 02, 2010

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