What is Shipping Tax?
1.
Amount charged for shipping an item above the actual cost of the item. Used when discussing sites, such as ebay, where sellers will sometimes charge large flat-rate shipping costs in order to try to get more profit from a sale.
I bid low because the shipping tax was outrageous.
See 
Random Words:
1. 
Intentional irritating the powers that be.
She was just twisting the tiger's tail when we were talking last night.
See twist, tai..