The phrase "does the technicolor yawn" is a slang term for vomiting, which is not uncommon in everyday conversations. However, it might be necessary to use synonyms for this phrase in situations that require a more formal tone or when speaking with individuals who might not be familiar with such slang. Some possible synonyms for "does the technicolor yawn" include expelling stomach contents, throwing up, retching, puking, vomiting, and regurgitating. Each of these phrases can be used interchangeably to describe the act of getting rid of the contents in one's stomach forcibly. It is always helpful to have an arsenal of synonyms for everyday language use.