noun
3-3-7 rhythmic clapping pattern
A traditional Japanese rhythmic hand-clapping pattern used at celebrations, sports events, and school functions. The pattern consists of three claps, three claps, then seven claps, often repeated.
運動会の応援で三三七拍子をした。
We did the 3-3-7 clapping pattern to cheer at the sports day.
卒業式の後、みんなで三三七拍子をやった。
After the graduation ceremony, everyone did the 3-3-7 clap together.
The name literally means 'three-three-seven beat', describing the clapping rhythm. The pattern is a well-known traditional Japanese celebratory gesture, but its exact historical origin is uncertain.