Top definition
The musty, buttery substance often found within the folds of skin; mostly seen in overweight/obese people.
Ew, haley, I touched your fold butter!

While tickling my girlfriend, I accidentally got some of her fold butter on my hand!
by Caleb and Haley December 08, 2017
Get the mug
Get a Fold Butter mug for your father-in-law Paul.