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Margera was born in West Chester, Pennsylvania, to Phil and April Margera. He is the younger brother of Jess Margera and nephew of Vincent Margera. His grandfather nicknamed him "Bam" at the age of three after his habit of running into walls. He attended East High School and cites friend Chris Raab as his only reason for attending high school, and dropped out after Raab got expelled for smearing feces on a locker. He later received his GED at the insistence of his parents.
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