rah–rah 
/ˈrɑ:ˌrɑ:/ adjective
always used before a noun /ˈrɑ:ˌrɑ:/ adjective chiefly US, informal : showing a lot of enthusiasm usually in a way that is annoying
▪ We were getting sick of his rah-rah attitude about the school. ▪ rah-rah cheerleaders
▪ We were getting sick of his rah-rah attitude about the school. ▪ rah-rah cheerleaders
