Another way of saying just joking around. It is often used in the awkward joke gone wrong setting
Tony B: AY-YO James sometimes I just think me and you should totally bum.
James: Are you serious Tony B?
Tony B: Yeah just... you know, try it out.
James: What the fuck man!? You know I will burn out all the battyman chi chi bloodclat man!
Tony B: Mi seh what is di problem?! Just jerking your gherkin mi lion!
James: Jah Blaze Up!
A meaningless phrase spouted out after an insult or confession, the literal meaning of which roughly translates either to "Fuck, I shouldn't have said that," or "I'm completely serious." Used often by annoying teenage girls.
Sister: Hey, Doug. I hate you. Just kidding.
Doug: Yeah by this point I think we all know what "just kidding" means.
Girlfriend: I have something important to tell you... I'm not really a virgin... Just kidding!
Doug: Who did you do it with and when?