From Jabroni Mike's livestreams, batching is a moment in someones life where they take an entire year to take just one shit, after which they will never have to poop again in your life. At the end of batching, the amount of poop has been mathmatically estimated to be the same size as the Goodyear Tower in Akron, Ohio.
Person 1: Hey why hasn't Mike been coming to work?
Person 2: Ah he's on leave right now. He's batching. I respect it.
Filling a bowl piece for a bong with half weed and half tabbacco from a cigarette. When a cigarette is opened for a batch bowl, it becomes the batch stick
A formal challenge to battle. The attacker sends a batchall to the defender, who tells the attacker what forces he/she is going to defend with. The attacker then tells the defender what forces he/she will use, normally less to acheive the greatest possible honor.