The phrase "big bust" refers to a situation where someone's plan, idea, or endeavor ends in failure or disappointment.
Sentences with «big bust»
Look the gorgeous contrast of stripes in this dress, the layered crop top has large stripes, which gives the illusion of bigger bust line. (creativefashionglee.com)
I bought this carrier in a S being 130 lb with a very big bust. (amazon.ca)
At this point, he is earning biggest bust of all time. (sbnation.com)