pep rally
US /ˈpep ˌræl.i/
UK /ˈpep ˌræl.i/
1.
a gathering of people, such as students of a school or college, to arouse enthusiasm and support for a team or a cause
:
•
The school held a pep rally before the big game to boost team spirit.
•
Students gathered for a pep rally to show support for their basketball team.