the.com/heckler

means Someone who interrupts a speaker or performer with mocking comments, questions, or jeers meant to throw them off.

from Comes from 'heckle,' which originally meant to comb and separate the fibers of flax or hemp with a toothed instrument — a rough, snagging process. By the 1800s the word had drifted into political life, especially in Scotland, where crowds would 'heckle' candidates with sharp questions, pulling them apart in public the way the tool pulled apart fibers. The name for the pest came a bit later, borrowed from the verb.