Raab is Bam Margeras bestfriend they have been so since highschool and when Raab got kicked out for smearing feces on someones locker Bam had no other reason to attend school so he dropped out.
Raab, Bam and Ryan Dunn all made and starred in CKY videos which were videos of them doing stunts amateurly kind of like Jackass, except Jackass is supporvised by proffessionnals. Raab starred in some Jackass stunts but not many. He starred in the ones that Bam could get him to do like the hanging wedgie which is where they strap undewear to a tree branch and Raab climbed the tree got into the underwear sat on the branch and then jumped off, the stunt resulted in bleeding of Raabs man parts. I havnt really seen much of Chris Rabb on Jackass but he did help jump start Bam and Ryan Dunns Jackass careers and what would Jackass be without Bam? not much, so i think Raab is pretty sick and so are his CKY videos.