What is Peppercorn?
1.
Decay in between your teeth that resembles an accidentally lodged peppercorn left over from a meal. Typically black and dirty looking teeth.
Waiter: "excuse me madam, but you seem to have a peppercorn stuck in your front molar"
Lady: "that's not a peppercorn, that is my tooth. Leave me alone you fag!"
See
2.
Something worthless, not a "good enough thing" in Contracts law
Your contract sucks because it lacks consideration, It's all words, just verbal masturbation.
you a peppercorn, playa.