The phrase "going mat" refers to the act of losing one's cool or becoming extremely angry. There are many synonyms for this phrase, including "blowing a fuse," "flipping out," "losing it," "going ballistic," "flying off the handle," "having a meltdown," "going off the deep end," and "going bananas." Each of these expressions conveys a sense of someone reaching their limit and becoming irrational, often resulting in some sort of outburst or temper tantrum. It is important to try to stay calm and composed in frustrating situations, but sometimes the emotions can become overwhelming and cause a person to "go mat".