The sudden urge to urinate WHILE shopping with a buddy or while trying to get the key into the locked door of your home when you return from shopping so you can pee.
The Shopping sPee is usually experienced by women of a "certain age" that have had one or more children and is similar to the Sneeze Pee and Laughter Dribble.
It is recommended that women who experience ANY of the above cross their legs immediately, stand completely still and wait for the sensation to pass before running immediately to pee on the toilet seat.
You get the groceries out of the car! I have to stand here for a minute...I feel a shopping spee coming on!