Commonly spelled as "YAR!!", the word originated as "YAY", but was misspelled and is now "YAR!!". Yar basically means yay, but is used as an expression of extreme joy or elation, moreso than with the word "yay". Commonly used in internet chats/messageboards, as it sounds really gay when you say it out loud.
by BushyBush March 15, 2004