ice·break·er 
/ˈaɪsˌbreɪkɚ/ noun
plural ice·break·ers /ˈaɪsˌbreɪkɚ/ noun [count] 1 : a ship designed to clear a passage through ice 2 : something done or said to help people to relax and begin talking at a meeting, party, etc.
▪ using an old joke as a conversational icebreaker — see also break the ice at 1ice
▪ using an old joke as a conversational icebreaker — see also break the ice at 1ice
