1. Verb. To pull a Cohen is to use inaccurate and inappropriate language or phrases to describe a simple (and generally understood) process, while speaking to the audience in a demeaning manner.
2. Adjective. Someone referred to as a Cohen typically talks from an experienced standpoint on something they have little or no knowledge of, often confusing or misrepresenting ideas or concepts. A Cohen is loud and has no problem speaking for a group of people, and often loses face with most listeners.
Don't be such a cohen!