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!