(rail transport) A train consisting of empty passenger carriages or one or more empty multiple units. Abbreviated as ECS.

(Australia) mind your own business; an admonition to an uninvolved person not to interfere

(US, sports) A coach who is assigned the task of ensuring another coach (usually the head coach) gets out of the way of the referees during games.

(Britain, idiomatic) To spoil, break or render ineffective (a rule, plan or agreement).

Alternative form of drive a coach and horses through