"Dost the technicolor yawn" is a colloquialism used to describe the act of vomiting. The spelling of "dost" may be confusing to some, but it is an archaic form of "does" and is used in a humorous and playful way in this context. "Technicolor yawn" is spelled phonetically as ˈtɛknikʌlər jɔːn, with the "a" pronounced as "aw" and the "y" sounding like "ya". Together, these words create a whimsical and fanciful phrase to describe a not-so-pleasant bodily function.