"Dost the technicolor yawn" is a slang term for vomiting, which can be described in various other ways. One synonym for this term is to "barf" or "puke", which refers to the act of forcefully expelling food and fluids from the stomach through the mouth. It can also be called "throwing up" or "regurgitating". Some may use the term "chunder" or "upchuck" to express the same idea. Other synonymous phrases include "spew", "disgorge" and "hurl". These terms are commonly used in informal contexts to describe the act of vomiting and are synonymous with "dost the technicolor yawn".