There are several synonyms for the phrase "come uninvited". Some of the most common ones include "drop in unexpectedly", "show up unannounced", and "crash the party". Others are "intrude", "trespass", and "invade someone's space". These terms depict someone who comes without an invitation, often without warning, and can be seen as a violation of social protocol. While some people may find uninvited visitors to be a pleasant surprise, others may feel uncomfortable or even threatened. Therefore, it's important to respect people's boundaries and seek permission before showing up uninvited.