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A term used when a well-endowed man replaces a donkey at a donkey show. The man is then expected to have sex with the woman/women instead of the donkey. Often occurs in Mexico or the Tucson, Arizona area when the donkey is no longer able to perform due to fatigue.
Everyone was looking forward to the donkey show, but the donkey had a heart attack right before it started. Randy stepped in and took care of business. That is how he got the nickname Big Donkey.

Don Felipe didn't want to lose out on the money the customers already paid so he replaced the burro with Big Donkey. Jimmy ended up getting the load of shame after watching the show in the alley.
by Chicago Joey Biscuits December 30, 2011
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