Home › Words › H › heartstopperheartstopperheartstopper means something highly exciting.Among words judged in Lexicurio's Arena, heartstopper ranks #9,163 of 42,752 for Qualifying.EtymologyFrom heart + stopper.nounSomething highly exciting.e.g.“One, “I Just Don’t Think I’ll Ever Get Over You,” was a heartstopper in the film “Garden State.”” — 2007 July 13, The New York Times, “Pop and Rock Listings”, in New York Times:Definitions & examples from Wiktionary (CC BY-SA 3.0).