I've never heard "a split."

I've never heard of "the splits"? What does this mean?

It's the same thing -- on the ground with your legs all the way out. In a googlefight, "do the splits" won by a lot over "do a split." [link]

Thanks for conducting this research, Jesse. This has been bugging me for years.

Another split singular person over here.

Batman's Origins, Galileo's Telescope, Awesome Lego Creations, and More!

The Origin of Batman according to the back of a box from a bootleg Batman Toy:

"When being a child, Bruce Wayne had witnessed with his own eyes the fact his parents of millionaire were killed cruelly, so affected his strong desire of revenging his parents. However, God had never given him a chance to fulfill his weill, following the advice of R'as Al-Ghul, the chief of ninja group, Bruce come to Gete, which was a corrupted city filled with various crime groups. Bruce found a basement under his villa, in which the equipments turn him into another person: Spiderman. With this mask, Spiderman stroke all criminal activates and criminals everywhere, such as Tougon, the chief of Mafia, Doctor Jackstraw, the abnormal drug trafficker, even a mysterious opponent familiar with him————-"

Ah, it all makes sense now.

"Doctor Jackstraw, the abnormal drug trafficker" sounds awesome!

Split singular, mid-Atlantic at the age when I was dumb enough to actually try to do one.

Another split singular person over here.

That just sounds painful.

I'm glad I actually didn't do a slit/splits. I can picture myself lying in agony on a hospital bed, while doctors and nurses argue over whether I did a split or the splits.

I've never heard "a split" before this conversation.

Another split singular person over here.

That just sounds painful.

Maybe Amy used to be half of a conjoined twin....