to speak about sb/sth in a way that shows that you do not respect them or have a good opinion of them
POUR / HEAP SCORN ON SB/STH
Meaning of POUR / HEAP SCORN ON SB/STH in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005