inter-class competition; class match
Wasei-eigo term used in school contexts for a sports competition between classes, especially ball games.
wasei-eigo (Japanese-coined English), from class match
We practice every day for the inter-class competition next week.
The class that wins the inter-class competition receives a certificate.
Wasei-eigo from English 'class' and 'match'. Not used in English with this meaning.