The phrase 'cutting corners' is defined when someone tries to do something as cheaply or as quickly as possible, often sacrificing quality.
Example of use: “It is certainly not a sensible to cut corners on your children's education."
This expression is often used by hunters. For example:The South Canterbury Hunt's Etiquette, Safety & Commonsense instructs riders: Follow the line that the hounds are taking, never 'cut corners' unless well behind where the hounds are working.