big shot
big gun
big wheel
big cheese
big deal *
big enchilada
big fish
head honcho

When the time came, they asked the big fish to go.

A few fish in the morning, though nothing very big.

Thing is, your husband has gone after some big fish here.

However, if all goes to plan, we can land a very big fish at the end of the year, which makes a change.

"Does a big fish ever break the line and get away?"

On almost every wall is a big fish he caught.

Maybe not big fish, but that wasn't the same thing as being very little.

We therefore need to start with the big fish and focus on them.

The possibility of a big fish was too much for him.

But they could not end their trip just because there were big fish in the river.