The phrase "flaps over" can be used to describe someone who is easily agitated or upset. There are many synonyms for "flaps over," including "freaks out," "loses it," "flies off the handle," "blows a gasket," "gets worked up," and "has a fit." These expressions all convey the notion of someone who is emotionally unstable or prone to dramatic outbursts. Other related phrases might include "gets bent out of shape," "goes ballistic," or "throws a tantrum." Whether in the workplace, at home, or in social situations, it's important to be mindful of how we react to stressful situations and to strive to remain calm and collected.