noun: a portion of marijuana somewhat compacted to fit into the bowl of a bong. The size of a bongload can range as small as a bee and as large as a couple pieces of chewing gum.
(If the bowl is overflowing with marijuana, you must call it a domer)
More sophisticated than just shouting from a car, but not as refined as shouting git your fuckin' rat out.
Designed to disorientate and bewilder the recipient.