cheerleader
noun [ C ] uk/ˈtʃɪəˌliː.dər/ us/ˈtʃɪrˌliː.dɚ/
（尤指美国）拉拉队队员（通常为女性）
a person, usually a woman or girl in an organized group, who leads the crowd in shouting encouragement and supporting a team at a sports event
She was a cheerleader for the Dallas Cowboys. 她是达拉斯牛仔队的拉拉队队员。
支持者;摇旗呐喊者
someone who strongly supports a particular idea or person
He was a cheerleader for the new economic plan. 他曾支持新的经济计划。