Looking up 'bunch' with reference to a question on ELL, I noticed that Merriam-Webster's first definition is protuberance, swelling. I don't see a similar meaning given by other online dictionaries, so presumably it's an American usage.
Oddly, the only time I've ever seen the word used in that sense is in Patrick O'Brian's novels. Some of his characters use it to refer to a camel's hump(s).
"Come, Doctor, as a natural philosopher you will certainly confirm that the dromedary is the hairy animal with two bunches that moves slow."
Has anyone else come across this in British English?