tailback

A "tailback" has two common lives in English. In American football, it is the running back lined up farthest behind the line, usually the player who takes the handoff and carries the ball. You can picture a quick, strong player trying to break through defenders and race toward the end zone. In British English, a tailback is a long line of vehicles delayed on the road, often because of an accident, roadworks, or heavy traffic. The image is simple: the problem is at the front, and the line of cars stretches back from it.

The word "tailback" has a clear double meaning depending on whether you are talking about sport or traffic. In American football, it refers to a running back who lines up deepest in the offensive backfield. In many formations, this is the main ball carrier, the player expected to run with the ball after a handoff and gain yards through speed, vision, and strength. In some systems, the tailback is the same kind of player many people simply call a running back or halfback. The idea behind the name is literal: this player starts at the "tail" end of the backfield.

In British English, "tailback" is also a common word for a long queue of vehicles on a road. It usually suggests that traffic has built up behind something that is slowing movement, such as roadworks, an accident, a closed lane, or simple congestion. Unlike a general traffic jam, the word often highlights the length of the line stretching backward from the problem. So, whether it is a player waiting behind the offense for the ball or a line of cars building up behind a blockage, "tailback" carries the same basic picture: something positioned at the back of a line.