Possible Clues:

• "Zounds!" to a texter
• "Holy cow!" in a text
• Shocked tweet
• Shocked reaction in a text
• 'Whoa!' on Twitter
• Texter's 'Egads!'
• 'Horrors!,' online
• Texter's 'Shocking!'
• Online "Lordy!"
• Texter's 'No 63-Down!'