From Longman Dictionary of Contemporary Englishblow something (up) out of (all) proportionblow something (up) out of (all) proportionEXAGGERATEto make something seem much more serious or important than it is → blow
Examples from the Corpus
blow something (up) out of (all) proportion• The issue was blown far out of proportion.• This case has been blown totally out of proportion because of the media attention. 