interjection. Common misspelling of hoot. Common misspelling of w00t. An exclamation of joy or excitement.
The Century Dictionary and Cyclopedia
A Middle English form of wot. See wit, verb
Word Usage
"Angus Stevenson Editor, Concise Oxford English Dictionary "The expression 'woot' began in America but was picked up very quickly by people in Britain, as a result of the internet breaking down international boundaries," said Mr Stevenson."