Possible Clues:

• 'Holy smokes!,' to a teen
• 'Wow!,' in textspeak
• SMS exclamation
• 'Wow!,' to a texter
• Internet interjection found in two theme answers
• 'wut!?'
• "LOL, I can't even!"
• 'Holy cow!' in a text
• Texting letters of shock
• "No. Way."