Related Clues:

• 'LMAO' alternative
• 'ROFLMAO!'
• LOL relative
• 'U R funny!'
• Crack response
• Response to an e-mail wisecrack
• Titter in a tweet
• Online outburst
• Texter's guffaw
• Gloater's taunt
• Twitter titter
• Chat-room ha-ha
• Nelson's catchphrase on 'The Simpsons'
• "That's a riot—not"
• "Very funny!"