|1.||playing in the mud|
"Playing in the mud" means anal sex.
Playing in the mud is usually applied to homosexuals, but can also be used in reference to heterosexual situations involving anal sex.
see also: fudge packing, buttsechs, bum sex, sodomy, anal sex, shit stabbing.
Ben: "Where is Austen?"
Ian: "Probably playing in the mud with Lance."
"Go play in the mud fag."