Possible Clues:

• 'Yay!'
• 'Yay!,' in a text message
• Ecstatic internet shout
• Gamer's "Yippee!"
• Slangy word of excitement
• Word often spelled with two numbers in the middle
• 'Wow!,' in Internet-speak
• "Awesome!" in a text
• Joyful internet cry
• Gamer's "Yay!"