A marathon bong session where everyone brings their own stash. The last person left conscious wins the bongathon, and as a prize, gets to drink the bong water.
I think I won last night's bongathon, but I don't really remember drinking the bong water.
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)