suicide beltnoun [ C ]
uk/ˈsuː.ɪ.saɪd ˌbelt//ˈsuː.ɪ.saɪd ˌbelt/a device like a belt worn around the waist with a bomb or bombs attached to it, used to cause an explosion that will kill the person wearing it as well as other people:
He had detonated his suicide belt inside a crowded restaurant, killing himself and twenty other people.