Wiktionary
phr. (context slang baseball dated 19th c. English) three outs.
Wikipedia
Side Out is a 1990 film about a beach volleyball competition, featuring C. Thomas Howell, Peter Horton, Harley Jane Kozak and Courtney Thorne-Smith. This was the last movie from Aurora Productions due to many flops. The film as directed by Peter Israelson.
The term “side-out” refers to an obsolete rule in volleyball under which the winning point could only be scored by the serving team. A side-out is now defined as when the receiving team earns the right to serve whether they get a point when they do so or not. Side-out can also refer to a type of scoring in a game of volleyball where only the serving team can score points.
Usage examples of "side out".
I fumble with my pajamas and robe, scrambling into them, accidentally turning a sleeve of my robe wrong side out in my haste.
Coming afoul of that old man has a sort of turned me wrong side out.
Again it presented itself, and he put on his vest the wrong side out, an evident sign of some violent inward struggle.
One of the most effectual ways of doing this was to turn the garments wrong side out and hold the seams as close to the fire as possible, without burning the cloth.
Now the bags were turned right-side out, and the zippers had slipped down a few inches.
When the six big men had done so as planned, Fortin squatted down and reversed his cloak to bring the pink side out.
She held one stick, pointed side out, toward the breach where she had entered.
He rushed to the dish, crammed everything into his cheeks, and rushed back to his soup can, where he hunkered in butt side out, vibrating with happiness and good fortune.