Bam Margera's taking more shots at Steve-O ... ripping his former friend for having some of the worst skateboarding style he's ever seen.
The former "Jackass" star tore into Steve-O's skateboarding mixtape with a video response, mainly taking issue with the way Steve-O completes his kickflips.
RIPPIN' IT UP
Bam says it's proof Steve-O's not as good a skater as him ... and he's also dissing his old buddy for not doing a rail slide in the video with Tony Hawk.