cut corners

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb To bypass a prescribed route so as to gain competitive advantage or to circumvent traffic signals or other rules of the road.
• verb idiomatic To do a less-than-thorough or incomplete job; to do something poorly or take short cuts.

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

• verb do something the cheapest or easiest way