Possible Clues:

• Texter's guffaw
• Texter's 'Hilarious!'
• "u slay me"
• Response to being slain, in texts?
• '2 funny!!!'
• 'Hilarious!,' online
• Internet guffaw
• Texter's 'That's hysterical!'
• 'ZOMG! That's too friggin' hilarious'
• "Ur 2 funny!"