The correct term for an exposed thong...
... is "whale tail"
According to an illuminating report yesterday, Google's new Street View might, if deployed across Europe, provoke a flurry of litigation from unfortunates caught in compromising positions by the facility's all-seeing eye. Well, we haven't yet seen any snaps of couples going at it like jackrabbits in New York doorways, or nude …
If you track forward and back along the street and pan toward the guy you can see he's doing something with a bicycle and takes something (possibly a phone) out of his pocket. He's not upright long enough to be urinating. An earlier pic in S.F. looks like it is actually a woman using a mirror or an ipod when you track up and down the street and pan toward them. It seems that any picture of a person facing away from camera who is alone and could be a man is assumed to be a guy urinating in public.
The only correct usage of the term whale tail is when describing the rear spoilers of Sierra/Escort Cosworths, or early mental Porsche engine covers/spoilers.
Or whales feet, for that matter.
There is a similar phot-mapping system at the council I work at, I did try to find embarressing snaps, but alas, nothing.
I was gutted.