Possible Clues:

• ROFL alternative
• "Hahaha," in a text
• Texter's 'Too funny!'
• ROFL relative
• Texter's "Too funny!"
• "u r 2 funny!"
• ROFL cousin
• "That's hilarious," in a text
• 'OMG, I'm cracking up!'
• 'U so funny'