jog trot

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A slow, steady trot, as of a horse.
• noun A regular, humdrum way of living or of doing.

from The Century Dictionary.

• noun A slow, easy jogging motion on horseback.
• noun A slow routine mode of performing daily duty to which one pertinaciously adheres.
• Monotonous; easy-going; humdrum.
• Adapted for an easy, jogging pace.
• To go at a jog-trot or monotonous pace.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun an easy gait of a horse; midway between a walk and a trot