Ц-8

ЦАРЬ И БОГ NP nom only subj-compl with copula (subj: human)

1. a person who possesses unlimited authority, power

lord and master

(be) like God Almighty.

Кругом на сотни километров была одна тайга, и жаловаться на произвол начальника экспедиции было некому: он был здесь царь и бог. For hundreds of kilometers around there was nothing but taiga, and there was no one to complain to about the tyranny of the expedition leader: here, he was lord and master.

2. an excellent specialist, a person who is very knowledgeable in some field or about some matter

topnotch expert

master hand whiz (one knows sth. ) inside out.

Давай попросим Роберта помочь тебе с компьютером, он в этом деле царь и бог. Let's ask Robert to help you with the computer, he's a whiz at computers.