Term coined by Denzel Washington in "Training Day"
Meaning:
one who is, while at the same time actin disloyal, is also actin bitchmade and like a punk, and is a fool-ass for thinking he gonna get away with it.
A person who is a real piece of work. Someone either really complex or really screwed up or someone almost unbearably hard to handle.
The genesis of the term can be traced from a person being a real piece of "work" or a real "load" and multiple jobs and tasks are often done in "batches." Thus.. a person who is extremely screwed up can be called a "batchload"