Pooping directly down someones throat, with, or without their consent.
by Zibrigsx February 09, 2006
2 more definitions
The railway that runs alongside the Hershey Highway.
Ooop, I feel a Brown Line Express coming through...
by Brian X June 16, 2007
The stain left after a wedgie occurs in undershorts. A brown line results if wiping is not sufficient after a bowel movement or a sudden burst of gas is released unexpectedly.
I hope your mom uses Tide to scrub your brown lines out of your underwear.
by DiegoSantiago June 29, 2014