phrasal
: to be thoroughly proficient or highly skilled in a field of activity or an area of knowledge : know the ropes
can rely on her completely because she really knows her stuff
phrasal
: to be thoroughly proficient or highly skilled in a field of activity or an area of knowledge : know the ropes
can rely on her completely because she really knows her stuff
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012