The natural evolution of H.A.M. (an acronym for Hard As a Motherfucker popularized by Kanye West and Jay-Z) for when you are going even harder in a way that only a grown ass man can.
Dude: It's time to go H.A.M.G.A.M. bro!
Bro: H.A.M.G.A.M.?
Dude: Hard as a motherfuckin' grown ass man!
Bro: Bro.
Dude: Bro.
This is going from top to bottom, right to left on your keyboard with spaces in between all the letter. You do this when your so board that you refuse to do something productive and start searching random things.
James was so board that he started typing m n b v c x z l k j h g f d s a p o i u y t r e w q instead of reading his book.