Route one means to drive a football towards an opponent's goal by a long kick upfield from the rear.
The technique is denigrated as an unattractive ploy by weak teams who lack the skill or confidence to move the ball along the field by talented play between team mates.
The long boot or "welly" by a goalkeeper or defending player bypasses many of the opposing players who may be dangerously skilful. It can be seen a shot in the dark, a hopeful search for a member of one's own team far upfield.
The goal came by route one; it wasn't pretty, but it counted just the same.
I'd fuck her route one if given half the chance!