The act of inserting your penis into ones mouth after the performance of anal sex. Preferably done to hood rats, not your main girl.
Alex gave me a brown mule last night and I think I liked it!
by Wizard Sleve Steve February 23, 2009
A swift knee to the middle of the asshole. This manuever is usually accompanied with two hands placed on the hips.
"Don't eat my chocolate lucky charms or I'm gonna brown mule you"
by Cody Meadows April 11, 2005