Dirty Animal

An experimental animal—e.g., a mouse—with subtle brain defects—attributed by some workers to an impoverished environment/cage—that might compromise the experiment’s validity
References in periodicals archive ?
Since Muslims are prohibited from consuming pork and consider the pig as a dirty animal, the emoji should be used with caution.
"I was shocked and horrified that I'd been bitten by a dirty animal.
Pork is banned in Muslim households as the pig is considered a dirty animal.
Poolton told a girl with an eating disorder she was a dirty animal, then forced food into her mouth and slapped her face three times.
She told the Irish Mirror: "When my periods started they never told me what it meant, they used to call me a dirty animal.
Pork is banned in Muslim households as the pig is considered "a dirty animal" under Islamic law.
On visiting the shop, which smelled of urine and dirty animal bedding, officers had to provide the animals with food and water.
He bent down to put something in his rucksack and some dirty animal had the wallet out of his pocket."
Philomena said: "He bent down to put something in his rucksack and some dirty animal had the wallet out of his back pocket."
The woman, who didn't want to be named, added: "He's nothing but a dirty animal. It's a shame for Janet because she just lives for her garden."