When someone, who is not usually that funny, creates general hilarity by saying something witty or clever and objectifies their joke as a coin (to be put into a jar).
The act of sticking a Cucumber in a woman's vagina and waiting a period of time to allow it to pickle in vagina brine. Usually followed by eating said pickle or putting it in someone else's salad.
A blue version of a Sun Jar, both of which can be found on ThinkGeek.
Ideal for a shroom trip. Holding a moon jar whilst tripping on shrooms creates a feeling of safety and happiness.
Cody: Get the moonjar and hide in that room; the evil demons are coming after us!
Dan: Moon jar!