A phrase coined by Teresa Strasser of the Adam Carolla Show on Free FM which refers to social outings that would normally be considered dates, but where one of the two people involved seems completely oblivious to the concept of dating. This is generally characterized by a lack of interest in conversation or flirting, an aimless absence of direction or goals for the evening, and possibly an uncomfortable revelation that the event was never intended to be date. This can be blamed on the modern tendency for self-absorption and a narcissistic belief that you shouldn't have to put forth any effort to be interesting or even pleasant.
I ended up going on a vague date with Jim. We went and saw a stupid buddy comedy and ate at Starbucks, but he split when he got a phone call from a friend to play basketball.
I don't even know if the date I was on with Nancy was a date, because she kept talking to me about how great it was to be single. I think it was some weird vague date.