slap something on/onto (something/someone)
phrasal verb with slap verb [ T ] uk/slæp/ us/slæp/ -pp-
informal disapproving
强制实施，强制执行；强制（某人）接受
to force a rule, tax, punishment, etc. to be obeyed or received
The government has slapped more tax on cigarettes. 政府已对香烟强制征收更高的税。
The librarian slapped a fine on him for returning the books late. 因为他逾期还书，图书管理员强制他交了罚款。