Main squeeze is a colloquial term that means a person's primary romantic partner. It is often used in a casual or informal setting, or as a way to express affection for someone. However, it is not the only term that can be used to describe a significant other. Synonyms for main squeeze include sweetheart, beloved, partner, lover, companion, soulmate, significant other, better half, and beau. Each term has its own connotations and nuances, but they all convey the same idea of a close and intimate relationship between two people. Ultimately, the choice of a synonym depends on the person's preference and the tone of the conversation.