Humpbacked swamp donkey is an excruciatingly ugly person. Normally associated with the the female gender and an extreme example of swamp donkey ie there are many men who will tackle a swamp donkey especially after a few bowls of loud mouth soup but only a rare breed will take on a humpbacked variety
"Jesus I was so steaming I pissed myself last night", "you must be so embarrased", "not as much as the time when you caught me shagging that humpbacked swamp donkey"