A phrase originating in Britain/Australia, frequently used in BBC comedies. (Some good examples of shows where this phrase is used frequently are Little Britain, Red Dwarf, and The Mighty Boosh.) Depending on the severity with which one utters the phrase it can mean one of four things;
1. Be quiet
2. Go Away
3. Go fuck yourself
4. All of the above

An excellent substitute for the phrase 'go fuck yourself' if you are in the company of small impressionable children, the elderly, or any other wanker who is offended by swearing.

An only slightly politer version of fuck you.

The other definitions are all purely American. The British and Aussie chaps use "get stuffed" to mean "Get lost!" or "Go away!"

"Shove it up your ass"

an English phrase telling someone to be quiet.

a word used by non-solid people who think they're solid