There are various synonyms for the phrase "blew the horn". Some alternatives include honked the horn, blasted the horn, sounded the horn, beeped the horn, and tooted the horn. These phrases are often used interchangeably, although some may be more appropriate in certain contexts. For example, honked and blasted are typically used to describe a loud and sustained sound, while tooted and beeped generally refer to a shorter and softer sound. Overall, there are numerous ways to describe the act of sounding a horn, and the choice of words will depend on the specific situation and intended meaning.