Home › Words › S › slapbackslapbackslapback means A kind of doubling echo with relatively long delay between repetitions of the sound, so that the individual echoes can be perceived.Among words judged in Lexicurio's Arena, slapback ranks #3,412 of 42,747 for Qualifying.EtymologyFrom slap + back.nounA kind of doubling echo with relatively long delay between repetitions of the sound, so that the individual echoes can be perceived.Definitions & examples from Wiktionary (CC BY-SA 3.0).