(informal) not to go in for half measures

(informal) not to believe one's ears

(informal) not to believe one's eyes

to sleep in separate rooms (of a couple)

passage of arms; joust; tilt; tourney

to know full well, to know very well

(proscribed) to know full well

not to give much for someone's chances, to think someone is dead meat

(figuratively, informal, of people) not to line up, not to queue up, not to crowd in, not to fall over each other (with the implied meaning that something meets with little success)

to double back, to backtrack, to retrace one's steps, to turn back