heckler

n. one who badgers, harasser

A heckler is a person who shouts an uninvited comment, usually disparaging, at a performance or event, or interrupting set-piece speeches, for example at a political meeting. A heckler is almost always regarded as unwelcome by the person with justifiable claim to be the centre of attention. The audience too usually finds the interruption an unwanted distraction; however they may sometimes find the interjection amusing or apposite.
See more at Wikipedia.org...

Noun
1. someone who tries to embarrass you with gibes and questions and objections
(synonym) badgerer
(hypernym) troublemaker, trouble maker, troubler, mischief-maker, bad hat
(derivation) heckle

heckler /'heklə/
danh từ người truy, người chất vấn, người hỏi vặn
(C) 2007 www.TừĐiểnTiếngViệt.net

PETTINATORE. SCOTOLATORE. INTERLOCUTORE IMPORTUNO