coffin corner

(WWII) The position in a formation of ships or bombers that is most exposed to enemy fire.

(aviation) A situation in which the aircraft cannot increase or decrease its airspeed without stalling or buffeting.

(American football) A corner of the field formed by the opponent's goal line and a sideline, into which a punt is often aimed in order to force the opposition to play close to their goal line.

Used other than figuratively or idiomatically: see coffin, corner.