One has much to say about something, but chooses to say only a fraction of it.

Everybody would change their circumstances if it were possible.

Alternative form of as far as the eye can see

Alternative form of one could hear a pin drop

simple past tense of could care less

simple past tense of could not care less

(idiomatic) Extremely quiet, for example, as during a lull in a normally bustling place or scene, or at a sudden dramatic or tense moment.

Said in a restaurant, to ask for the menu.

(figuratively) Something that is very small or limited.

Alternative form of could be written on the back of a postage stamp