Double Booking 

The horrendous situation observed in a typical office toilet that contains 2 cubicles, both of which are simultaneously occupied resulting in damnation without relief.

Lloyd: "Wow Dave, you were back from the shitter quickly!"
Dave: "Do not go in there. There's an absolutely awful Double Booking!"

Double Booking by The Evil Muppet November 6, 2011

double-booking 

A social faux-pas wherein a person, usually male, will schedule two separate romantic encounters for the same day. Will eventually be discovered, generally when one date forces a delay of the next.

Jackie was pissed to discover that Andrew had been double-booking she and Elyse, and broke up with him right there.

double-booking by Eleglac August 18, 2011

Double-Booking 

The moment when you are browsing Facebook on your computer, and then reach for your phone and instinctually check Facebook, thus resulting in an awkward, "Double-Booking."

I noticed I was double-booking yesterday as I was updating my status on the computer and liking your photo on my phone!

Double-Booking by The Clint January 19, 2014