What is Cheer ?
Cheer is (noun) a shout of praise or encouragement When he scored the goal a great cheer went up. three cheers three shouts of praise for someone Three cheers for the goalkeeper! hip! hip! hooray!(verb) to shout encouragement The crowd cheered when the first marathon runners appeared. Synonym applaud. Antonym boo
source: Easier English, Student Dictionary Upper Intermediate Level