Rob Dyrdek's cousin -- the guy behind the "Young & Reckless" clothing label -- rues the day he accidentally ripped off the infamous Hells Angels death logo for his t-shirt line ... telling us, he's deeply sorry for the mix-up.
TMZ broke the story ... The Hells Angels sued MTV and Rob Dyrdek's company -- claiming Dyrdek was behind the shameless logo jacking -- but last night outside Boa Steakhouse, the MTV star set the record straight ... insisting he has NOTHING to do with the "Young & Reckless" clothing line.
Dyrdek then throws his cousin Chris "Drama" Pfaff under the bus -- claiming Y&R is 100% owned by him ... so "if you need to stomp anyone out, stomp this guy out."
As for the lawsuit, Chris claims, "It's done. It's taken care of."