What does "闪光弹" mean?

通过语言、动作向周围的人有意或无意地公开炫耀情侣间甜蜜感情的行为。这种行为闪耀着刺眼的光芒，就像闪光弹一样，会让周围人的眼睛感到刺痛而不得不转头或者带上墨镜

ENThe act of intentionally or unintentionally showing off the sweet feelings between a couple to those around them through language or actions. This behavior shines with a dazzling light, like a flashbang, which will make the eyes of those around feel sore and have to turn their heads or wear sunglasses.