"感情泛滥"的英语表达可以用 "emotional overflow" 或 "emotional flooding" 表示。这个说法来源于心理学，指的是一种情绪状态，在这种状态下，人的感情会过度激动或溢出，而且很难控制。

下面是一些英文例句和中文翻译：

She was overwhelmed with emotion when she saw her long-lost friend. (当她看到她失散多年的朋友时，她的感情泛滥了。)

He was feepng emotional flooding after watching the sad movie. (他看完那部悲伤的电影后感情泛滥。)

She tried to calm down, but the emotional overflow was too much to handle. (她尝试冷静下来，但感情泛滥太难以控制了。)