heckler
/ˈhɛk.lər/Definitions
1. noun
a person who disrupts a performance, meeting, or public event with comments or questions, often in a mocking or hostile manner.
“The comedian’s jokes about politics brought out a heckler from the audience.”
2. verb
to disrupt or mock someone’s performance, especially in a public setting.
“The crowd started to heckle the singer when she hit a wrong note.”