Ham stands for: hard as a motherf**ker. Therefore, this word is easily defined as "going hard as a motherf**ker". Every other definition I've seen on this website is definitely not right.
According to MTV.com..."Jay-Z and Kanye West dropped their first single, "H.A.M.," on Tuesday, January 11th, but their record may have overshadowed another "ham" song: Yung Joc and Gucci Mane's "Going Ham" leaked over the weekend.
The tracks aren't related, nor do they have anything to do with a choice cut of pig: The Jay and 'Ye song name is actually an acronym that stands for "Hard As a Mother----er," while Joc and Gucci's version is based on the Atlanta term "going ham," which is a derivative of mayhem. Joc admits most people may not even know the term's origin."
John: “Michael Richards was totally going ham last night at the Laugh Factory. You see that?”
Aaron: Yeah, did you hear how many times he called that person a n*****?”
John: “Yeah, he went hard”