Top Definition
A hybrid of Herp Derp. Whenever you see a chick who is dirty and incompetent the phrase is suitable for usage. It is only used when referring to someone in particular, or when ever their name comes into conversation.
Bro 1: "Man, did you see Julie today?"
Brah 2: "Birth Dearth!"
by brownz99 June 01, 2010

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