The phrase "weirded out" is a vernacular expression, which means to feel uneasy, disturbed, or uncomfortable. It's commonly used in casual and informal conversations, but there are several synonyms that can be used to convey the same emotion in a more formal setting. Some of these synonyms include creeped out, unsettled, disconcerted, unnerved, perturbed, and troubled. Other suitable alternatives could be spooked, bewildered, flustered, taken aback, or freaked out. Each of these phrases can be utilized in context to express a similar feeling of unease and confusion, without resorting to the colloquialism of "weirded out".