Related Clues:

• Online display of amusement
• Chat room ''That's a riot!''
• Cyberchuckle
• ''Fat chance!''
• IM delight
• Preceder of “haw”
• Cyberspace ''Ha-ha!''
• With 103 Across, donkey remark
• "Unlikely!"
• Cybercackle
• Not quite ROTFLMAO
• Sarcastic laugh
• Cyberroar
• Ha-ha, nowadays
• Text te-hee