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1.
to go out in the mud in the back of a truck or jeep or other 4x4 vehicle and spin in the mud until all the occupants are covered in mud.
I am so dirty. We went mudding earlier and I just know this mud won't come out of my clothes!
by Caitlin8014 May 27, 2005
 
2.
sex with a person of a darker skin color than you.
Chloe Kardashian went mudding with Lamar
by mordorman45 March 04, 2012
 
3.
anal sex
Tyler- "Hey man, wanna go mudding?"
Mario- "Sure, why not? That sounds fun!"
by flashlonkashlonk May 11, 2010
 
4.
An autoerotic or homoerotic activity in which butch gays and bis get their shoes, jeans and even whole selves muddy while pounding tar around town or skating. Mudding is the latest fetish to reveal itself online in a big way. Also called "muddin'."
Derk and Craig always went mudding around The Charles after skating through Cambridge, getting their baggy jeans and Airwalks all dirty and wet.
by BleekerStreetBrian March 02, 2008
 
5.
To play, or take part in, a MUD (Multi-User Dungeon,Domain, or Dimension)
Man, there's nothing better to do than Mudding on a Saturday night!!
by NeNeK January 23, 2007
 
6.
Having Anal Sex.
Man, This Weekend I Went Mudding With My Girl. And She's Still Walking Funny.
by Mofu November 21, 2003