Bam Margera's turning up the heat in his beef with the 'Jackass' crew, taking shots atJohnny Knoxville, Wee Man, Steve-O and director Jeff Tremaine.
Bam's got a feature on a new single called "Feel Like Bam" by rappers Cult Shotta and Tanboymiguel ... and he uses his verse to rap about how bad his old 'Jackass' buddies are at skateboarding, while challenging Knoxville to a fight and blaming him for ruining his skateboarding career.
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We are told Bam met the rappers at a studio in Los Angeles where he was working on music and asked to jump on one of their tracks.