Related Clues:

• 'Haha, u r hilarious'
• 'That cracks me up!'
• "How hilarious!" in chat rooms
• Chuckle online
• __-haw (donkey's sound)
• "I'm cracking up," in a tweet
• Roaring online?
• Small snicker
• Titter on Twitter
• Start of a bray
• "That's funny" online
• Bit of IM mirth
• Texted titter
• 'UR so funny!'
• Texting 'ha-ha!'