A hot-button is a problem or subject that makes people argue and feel strongly — money, politics, whose turn it is to do the dishes. You will hear it most as a describing word before a noun: a hot-button issue, a hot-button topic. News and political talk love it. The picture is a button so “hot” that if you press it, the room explodes. It is informal to neutral. Though actually it is not a real button, and it is not only about huge public fights: any subject that splits a group can be a hot button, even inside one family.

敏感話題；一碰就吵的議題。