From Longman Dictionary of Contemporary Englishlike it’s going out of fashionlike it’s going out of fashioninformalLOT/LARGE NUMBER OR AMOUNT use this to emphasize that someone does something a lot or uses a lot of something Danny’s been spending money like it’s going out of fashion. → fashion
Examples from the Corpus
like it’s going out of fashion• She's been spending money like it's going out of fashion. 