cut corners

verb2

1. •
   To bypass a prescribed route so as to gain competitive advantage or to circumvent traffic signals or other rules of the road.

   • […] but I believe the old man did not ride fair, as he cut corners and joined in with them again […] — 1882
2. •
   To do a less-than-thorough or incomplete job; to do something poorly; to take inappropriate shortcuts.

   • The guy who built the fence cut corners when sinking the posts, and the fence fell over in the last storm.
   • Do you know why Wendy's has square burgers? Because they don't cut corners.