1stop·per 
/ˈstɑ:pɚ/ noun
plural stop·pers /ˈstɑ:pɚ/ noun [count] 1 : someone or something that stops something
▪ crime stoppers ▪ His comment was a conversation stopper. — see also showstopper 2 : something that is used to block an opening
▪ a plastic bottle stopper ▪ a wine stopper
▪ crime stoppers ▪ His comment was a conversation stopper. — see also showstopper
▪ a plastic bottle stopper ▪ a wine stopper
