How did Bam Margera get the name or nickname Bam?

Answer 1

Bam Margera was born Brandon Cole Margera. He changed his name because; when he was younger he was beat up by a lot of kids and chose Bam because his parents always called him Bam Bam.
http://www.angelfire.com/empire2/bam_margera

Answer 2

Bam's name originates from his childhood when he would sometimes go crazy and run into walls, causing his grandfather Pop-Pop to say "Bam, bam, bam, chill out! Bam!" Bam was 3 years old

Answer 3

i don't know but he's freakin hot and so's his dad phil