Related Clues:

• 'That's rich!'
• Response to a funny YouTube link, say
• "I get it, but ..."
• Response to an e-mailed joke, maybe
• Reaction to 'ZOMG'
• Gag response
• Sounds of hearty laughter
• Internet snicker
• ''Ah!''
• LOL, out loud
• 'LOL!'
• "Ha ha, very funny"
• 'Ha!,' in chat
• "Ha!," in chat
• "The joke's on you!"