The term 'blew up' can be used to describe a variety of situations. It can mean that something has been enlarged, INFLATED, swelled, BOOMED, got mad, saw red, had a fit, exploded, or boiled over. In each case, the term implies a sudden and dramatic increase in size, intensity, or emotion. For example, if someone 'blew up' a balloon, it would mean that they have rapidly filled it with air until it is much larger than it was before. Similarly, if someone 'blew up' in anger, it would mean that their emotions suddenly became very intense.