"Fit to be tied" is an idiomatic expression used to describe extreme anger, frustration or agitation. Some synonyms for this commonly used phrase include being "livid," "infuriated," "incensed," "furious," or "enraged." Additionally, other phrases that share a similar sentiment include being "at the end of one's rope," "on edge," or "at boiling point." Whether you're experiencing a minor annoyance or a major issue that has you feeling overwhelmed, there are many different ways to express the intensity of your emotions using language that conveys the full range of feelings associated with being "fit to be tied".