Derived from: "shit mittens"
Also can be used as a show of surprise, anger, or disappointment.
Person 2: "Not only did i get them, I also got a pair of shittens!"
Person 1: "Shittens mate! thats fuckin brill!"
The term for a pair of socks worn as emergency mittens to clean oneself after a drug induced festival attack of diahorrea.
- Ronny Biggs' Essential Festival Diary 2001