Possible Clues:

• “Hahahaha” alternative
• "Oh, our sides are hurting!"
• “Hilarious!” to a texter
• "Hilarious!," in a text
• [sooo funny!]
• "hahaha"
• 'Wow, that's 2 funny!'
• 'Hilarious!,' in a text
• “That’s hilarious,” in texts
• 'Hahahahahaha!'