heckler

US /ˈhek.lɚ/
UK /ˈhek.lɚ/
"heckler" picture
1.

a person who interrupts a public speaker or performer with aggressive or rude comments or questions

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The comedian skillfully handled the heckler in the front row.
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Security removed the persistent heckler from the event.
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barrackercatcallerdisrupterinterrupterjeerertaunter