One who wanders aimlessly, who roams, who travels at a lounging pace.
An idler, a loafer.
To wander aimlessly or at a lounging pace.
One who lags behind; one who takes more time than is necessary or than the others in a group.
Lagging behind; taking more time than the others in a group.
Not growing as quickly as the rest of the flock or herd.