topper
noun [ C ] uk/ˈtɒp.ər/ us/ˈtɑː.pɚ/
(THING/PERSON ON TOP)
Indian English（课堂或学校中的）顶尖学生
the best student in a class or school
(HAT)
UK高顶礼帽（top hat）
informal for top hat
They were wearing grey toppers and standard wedding gear.