- blow up
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1. in. to burst into anger.□ I just knew you’d blow up.□ So she blew up. Why should that affect you so much?2. n. an angry outburst; a fight. (Usually blowup.)□ After the third blowup, she left him.□ One blowup after another. Yuck!3. n. an enlarged version of a photograph, map, chart, etc. (Usually blowup.)□ Here’s a blow up of the scene of the crime.□ Kelly sent a blowup of their wedding picture to all her relatives.4. n. the ruination of something; the collapse of something. (Usually blowup.)□ The blowup in the financial world has ruined my chances for early retirement.□ After the blowup, they called one another to compare notes.
Dictionary of American slang and colloquial expressions. 2015.