A severe profanity thought to originate from jamaica by peter tosh, the unsantitary nature of the female period (blood clot). It can be used in many contexts, especially to back up a strong statement.
"Yo give memy money, youve owed by since friday"
" Alright fine, take it you bumba clot"
Back in Jamaica when the woman had their periods they did not have disposible towels, they would use clothes and then wash then, when they were hung up to dry, when they were on the drying line they were called Bumbacluts. It is a very rude word in Jamaica, like cunt