H.A.M (not to be confused with going ham) means Hard As a Muthafucka' popularized by Kanye West and Jay-Z in the first released single from their up and comingcollab album
Example 1:Urban Dictionary is H.A.M
Example 2: I'm bout to go H.A.M, hard as a muthafucka let these niggas know who I am - Jay-Z & Kanye West