When two gays do something insync. It can be saying something at the same time or even just reacting with the same mannerisms.
Straight Girl: "Hey guys look a bug!"
The Two Gay Guys: "Aww how cute! Haha twink sync!"
Straight Girl: "What Haha! Twink Sync?"
One Of The Gay Guys: "It's when two of the twinks sync up and start saying things in unison. I can't be around other twinks too long or I sync up."