Top definition
1. The process of planning the cost of anything you are willing to spend your money on with the idea you will spend the equivalent to that or less, in turn it results in costing more by at least 20%.

2. The final pricing of any advertised product.
The computer advertised for $499.99 comes to a final total of $687.32 with tax, warrantee, and spyware. The Tip Rule.

Dan: "I'm going to the bar and keeping it to $50 bucks."

Chris: " Remember The Tip Rule bro."
by cmp62 September 14, 2010
Happy St. Patties Day!