A younger man who enjoys the company of older women. Sp. Someone who has had success in his sexual advances towards older women. Similar to a Cougar Hunter or Cougar Hawk.
Q: What are you up to tonight?
A: I think I'll get downthe boozer and try out my new Mutton Bustin' trousers Q: You are such a mutton buster
Often occurs during coitus when one's partner makes a retarded animal sound causing one to flip them on their back like a farmer and pound it out like a rodeo star; The mess it leaves behind requires a calf style cleaning where one's partner licks everything clean.
Brooo, she honked like a downsyndrome goose so I flipped her over, held her wings, and started mutton busting.
EX. 2: She wanted me to take her mutton busting so I told her to be a baaaaad gurl and I'll call the farmer.