Brown Musket describes a sexual act which typically involves at least one male. It occurs when an individual takes a dab of excrement onto their finger and then inserts it into the pee-hole of an erect partner. The pinky is most often used, but more advanced 'Brown Muskateers' often graduate to the use of the larger digits when a willing partner is able to withstand what is usually considered an intensely painful experience. The source of the fecal matter used is irrelevant but most often belongs to one of the involved participants. Extra points are earned the heavier a musket is loaded. Common side effects include urinary tract infections, as well as pissing shit.
Mary was mildly disgusted, but not altogether surprised when Ian's dick tasted like shit after she delicately performed her first Brown Musket on him.
by slithering succotash August 18, 2016

When a World War 2 Australian pilot shits himself, ejecting fecal matter and animal semen into the cockpit of his plane, while being chased down by a Japanese pilot in the skies above New Guinea after having sex with a wallaby. This action turns the entire canopy of his fighter brown in color.
Rei Sen 1 to Rei Sen 2, that limey yellow toothed criminal just shat his pants! I got a Brown Aussie at 1 o'clock!
by Rodney_Sexfart November 27, 2013

the act of spreading you ass cheeks, flexing the anus muscle, shouting, "i am the brown cyclops, I see all!"
by Teabag man June 11, 2008

The action when you stick your finger in your asshole and then make a mustache on someone else's face.
by Psychoholic July 14, 2014

a magical place you visit with special friends, that rarely any of the involved parties will fully remember.
by BrownMileTourGuide February 20, 2020

by Trader1933 January 15, 2017

by nialls princess sabrina July 10, 2016
