KNOCK STH
Meaning of KNOCK STH in English
down (from sth) (to sth)
( informal ) to reduce the price of sth :
He knocked down the price from $80 to $50.
—see also knock-down
Oxford Advanced Learner's English Dictionary.
Оксфордский английский словарь для изучающик язык на продвинутом уровне.
2005