The phrase "do the technicolor yawn" is slang for vomiting, and as such, there are a variety of synonyms that can be used in its place. Some other phrases that could be used instead include blowing chunks, hurling, puking, upchucking, spewing, and barfing. In more formal language, the act of vomiting can be described as regurgitating, retching, or expelling one's stomach contents. Regardless of the specific word used, it is important to remember to show empathy and concern for someone who is experiencing this distressing physical reaction.