Stuff you do behind a shed; esp. eating a girl out, pissing, and laughing at people eating a girl out.
Man, that one kid tries to say he doesn't like blow jobs cuz they are nasty, but he shouldn't be judging after that shed shit.
The type of thing someone would do behind a shed, usually illicit, nasty, or embarrassing things.
eg. smoking pot, giving oral sex, urinating
We made fun of him for weeks after we caught him doing that shed shit.