agent noun from heckle (v.); mid-15c., from late 13c., as a surname (Will. le Hekelere). Modern sense of "one from the audience who taunts a public speaker" is from 1885. Fem. form hekelstere is attested from c. 1500.
1. The heckler was ejected from the meeting.
2. As he began his speech, a heckler called out asking for his opinion on gun control.
3. The heckler was ejected from the auditorium for creating a disturbance.