Top Definition
1. something you call a person (mainly female) that is a slut, mong bitch or rank.

2. a person (again mainly female) that has huge gaps in their teeth.
1. matt: hey gap rat go fuck that guy again.

2: harry: hey gap rat get ya fuckin teeth fixed.
by iamgavatron90456 February 05, 2009
6 Words related to gap rat

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