( informal ) to think or talk about sth all the time and to think that it is very important
HAVE A BEE IN YOUR BONNET (ABOUT STH)
Meaning of HAVE A BEE IN YOUR BONNET (ABOUT STH) in English
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005