tailback

/ˈteɪlˌbæk/

Etymology

From tail + back.

tailback means A line of motor vehicles causing or the result of traffic congestion or a traffic jam. Lexicurio rates it Sui generis — a strength score of 91 out of 100.

noun

A line of motor vehicles causing or the result of traffic congestion or a traffic jam.“The idea of a British warship supposedly menacing Spain is ludicrous. Is it meant to bomb Cadiz? Will its guns lift a rush-hour tailback in a colony that most Britons regard as awash with tax dodgers, drug dealers and right-wing whingers? The Gibraltarians have rights, but why British taxpayers should send warships to enforce them, even if just "on exercise", is a mystery.”
A running back or halfback who lines up furthest to the rear in an I formation.