The name of a burger unlike any other, famous in Portland Oregon.
It's a grilled cheese sandwhich for one bun, a 1/4lb angus beef patty, egg, bacon, ham, spam, the extras (lettuce tomato etc), and another grilled cheese sandwhich for the top bun.
its a hybrid of ridonkulous (extremly ridiculous) a badonkadonk (a huge ass in comparison with a womens body)
In other words its a ridiculusly huge ass
ridonkulous + badonkadonk = ridonkabonkadonkulous
Alfie : damn! that girl has badonkadonk ! James : thats a ridonkulous badonkadonk! Roger & Harry :NO U HO-MO-FOS! that girl is ridonkabonkadonkulous!