Top definition
The soft or crusty brown layer of residue frequently found on the inside of underwear.
The more chili my husband eats, the more farter sauce I find in his underwear.
by PapaEllis October 15, 2012
Get the mug
Get a farter sauce mug for your cousin Beatrix.
This Means... You use it in your farting pizzas and are most likely to not smell good, So if you see this in the world make sure to put it on your Fart pizzas, It ussually causes an infection in the nose because of its dangerous fumes.
by April 20, 2018
Get the mug
Get a FarterSauce mug for your mother-in-law Larisa.