gallop through something
1. Lit. [for a horse] to pass through something at a gallop. Her horse galloped through the garden and dumped her in the cabbages. A few horses galloped through the meadow.
2. Fig. to go through something quickly; to do or perform something rapidly and perhaps carelessly. Mike galloped through his song and left the stage in a hurry. Don't just gallop through your homework!
See also: gallop