Native to the west coast fast food chain In-N-Out, animal fries are part of the "secret menu" and consist of french fries covered in melted american cheese, diced grilled onions, and a sort of ghetto-aioli sauce.
'Oh my god, I wasn't even hungry. But that drunk fool said two words: Animal Fries'

'Dude, you know what I could go for? Some aaanimal frrries'
'Pass that ♥♥♥♥'

In-N-Out Burger[www.in-n-out.com]