A fork of Rural Dictionary
The act of inconspicuously dumping out an unwanted alcoholic beverage because you cannot drink as much as your cohorts.
Little Jimmy was nailed big time for ignoring the "No Piking" sign at the house party when he dumped his beer into the bushes.
To have not attended some event or function, typically with some poor excuse (such as not feeling like it, or for fear of some social interaction).
David, you piked out on my party. You better come next time!