It means "stop passing the pepper" or stop being awkward so as to make any situation (awkward or not) even more awkward.
When in an elevator with someone you don't know:
Person 1: "Stop passing the pepper or SPTP."
Person 2: "..."
by Reiro March 31, 2010

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×