When you are stopped waiting for a turn, most often a red light, and your blinker synchronizes with the person's in front of you blinking at the same exact time and rhythm.

When several women, who have never or hardly met, start spending time together and theirs vaginas synchronize and decide to bleed on the same day.

VSYNC (or V-sync) is shortform for Vertical synchronization.

In video games, if you rapidly turn around, you will experience a phenomenon called 'screen tearing'.

Imagine a pole in the game, and if you turn quickly, instead of the entire pole moving past your field of view, only the lower or upper half moves, while the other half stays there for a split second, and then moves away as well.

This phenomenon is caused if your graphic card is working faster than the refresh rate of your monitor.

Turning VSYNC on tells the graphic card to not produce updated imagery (frames) any faster than your monitor's screen rate (usually 60 - 75Hz; 120 Hz if you're a rich kid or still have a CRT, lol)

...thereby "dropping" the frames down to whatever your monitor's maximum display rate is, eliminating the screen tearing.

Technology/computing-based pun: it took nearly 3 hours for the Titanic to sink on April 14th 1912 so the pun can be used when files take longer than expected to sync.

Sync is the homophone of sink.

Sync being the abbreviation for synchronization or the process of keeping dataset copies consistant between one another in a computer system/network.

Sink meaning for something to go below the surface of water.

1. The grasping of hands by two people, as in greeting or leave-taking.
2. Computer Science. An exchange of signals between two devices when communications begin in order to ensure synchronization.

when you walk around and see a group of ghetto people all dressed the same;and in winter, they are all wearing the same quilted black puffy coat. they also walk in synchronization and talk very loudly

Much confused with out of synch, it means that two objects are not in synchronization or are opposing each other. Can be used as an insult if pointed at a single person, meaning "Out of touch with reality"