bouncy castle
noun [ C ] UK uk/ˌbaʊn.si ˈkɑː.səl/ us/ˌbaʊn.si ˈkæs.əl/ (US bounce house)
充气城堡，充气弹床（供儿童跳跃玩耍，做成城堡的模样）
a large plastic structure, usually in the shape of a castle, that is filled with air and that children can jump up and down on for fun