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A character from the old Nickelodeon show, "All That." Lil Fetus is a rapper who "isn't even born yet." He appeared on the show on an ultrasound and is a satirical character for 90's rappers such as Lil Bow Wow.
Bob: Hey Mike, check out Lil Fetus. That dude's got a sick flow.
Mike: Yeah. And he isn't even born yet.
by idkitswhatever May 08, 2011
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