tailback

[ teyl-bak ]
/ ˈteɪlˌbæk /

noun Football.

the offensive back who lines up farthest behind the line of scrimmage, as in a single wingback or double wingback formation.
the position played by this back.

Origin of tailback

First recorded in 1935–40; tail1 + back1

British Dictionary definitions for tailback

tailback
/ (ˈteɪlˌbæk) /

noun

a queue of traffic stretching back from an obstruction