gangbang /ˈɡeɪ̯ŋˌbeɪ̯ŋ/noun 3verb 2forms 3 noun3 •(vulgar) An act of two or more people having sex with one person who is the focus of the sexual activity. •(vulgar) Synonym of gang rape.One night the mob turned up in force and wrecked the joint. Left the girls alone, but had themselves a gang-bang with Tiffany. She was only sixteen at the time. — 1956 •(US, slang) An act of a street gang committing crimes as a group, such as attacking random people on the streets. verb2 •To belong to a gang; to commit criminal acts as part of a gang.It broke my heart to see him out there gangbanging. •To participate in a gangbang.We all got to gangbang the porn star. formsgangbanged · gangbanging · gangbangs