JK – Just Kidding
I'm just kidding about that dude. Relax.
I don’t know how I’ll get out of this jam.
The mall is jam packed.
Jerk someone around:
Treat someone disrespectfully.
The mechanic was jerking me around about the repairs.
Jiffy (In a jiffy):
We’ll have it ready in a jiffy.
To bring bad luck.
He jinxed me by saying, “There’s no way you’ll fail your test!”
Athlete (often with a negative feeling).
I hate that dumb jock.
Her idea that I don’t love her is just plain wrong.