bring up the rear

bring up the rear  {v. phr.}

1. To come last in a march, parade, or procession; end a line.

The fire truck with Santa on it brought up the rear of the Christmas parade.

The governor and his staff brought up the rear of the parade.

2.  {informal}

To do least well; do the most poorly of a group; be last.

In the race, John brought up the rear.