Longman Dictionary English From Longman Dictionary of Contemporary EnglishRelated topics: Crimegang-bangˈgang-ˌbang noun [countable] 1 informalSYSEX/HAVE SEX WITH an occasion when several people have sex with each other at the same time2 SCCSEX/HAVE SEX WITHa gang rape —gang-bang verb [intransitive, transitive] ldoceonline.com