In an online conversation, a response to a comment/story/observation that is only barely funny or marginally amusing.
Formed from a degradation of the frequently used online conversational terms haha
Stacy: Last night was pretty crazy
John: really, what happened?
Stacy: Jennie spilled a milkshake herself!
John: haha, that's funny
Stacy: Then get this - we ordered a new milkshake... and they brought us the wrong flavor!!!!!