Related Clues:

• "That's funny!" on the message boards
• 'That's funny!' on the message boards
• E-chuckle
• 'OMG, that's sooo funny!'
• Cyberguffaw
• Textspeak abbr.
• Chat room chuckle, for short
• Online prefix for 'cat'
• WTF relative
• Possible reaction to a n00b
• E-mail cackle
• Ubiquitous online initialism
• Response to a funny YouTube link, say
• Response to an e-mailed joke, maybe
• Reaction to 'ZOMG'