Short-hand for "Yeah, Yeah, Woo!", an exclamation conferring the feeling of excitement while, at the same time, ending a conversation.
Typically used to terminally punctuate just about any tele-mobile-phone text or electronic chat.
Praise the lord, we're finally done with that dreaded renal pathophysiology exam tomorrow. Whew! I am really excited for getting completely obliterated afterwards. Alright sucka, G-chat you later! YYW!