Haha, just kidding
I left the stove on, could you go home and turn it off?
Um, no. I'm like an hour away.
... very funny
|HHOJ/K||Ha-ha, only just kidding|
|HHOK||Ha-ha only kidding|
|LJK||LOL just kidding|
|UG2BK||You've got to be kidding|
|AYFKM||Are you freaking kidding me|
Someone who is joking around with you may use HHJK to mean "haha, just kidding." You'll most often encounter this acronym as a follow-up to a sarcastic or facetious comment.
In some instances, however, people instead use HHJK to attempt to walk back a true statement they wish they hadn't said. In some of these cases, it's best to just play along. In others, you may want to take the person to task for their previous statement ...