man bun
noun [ C ] informal uk/ˈmæn ˌbʌn/ us/ˈmæn ˌbʌn/
男士丸子头，男士发髻
a hairstyle for men in which some or all of the hair is pulled together to form a round shape at the back or on top of the head
Not since the mullet has a men’s hairstyle provoked as much public debate as the man bun. 自从“鲻鱼头”发型以来，还没有哪种男式发型像男式丸子头那样引起公众如此激烈的争论。