What is another word for go off deep end?
Pronunciation: [ɡˌə͡ʊ ˈɒf dˈiːp ˈɛnd] (IPA) 
The phrase "go off deep end" is an idiom that means to become irrational or irrationalize an idea. There are several synonyms for this phrase, including "lose your mind," "go bananas," "flip your lid," "lose your cool," "have a meltdown," "fly off the handle," and "blow a fuse." These expressions describe a person who has lost their grasp on reality and is acting out in ways that are not logical or reasonable. It can also imply a person who has become overly emotional and is reacting in a way that is out of character. Regardless of which synonym is used, it typically describes a lack of control over one's thoughts or emotions.
