Idiom of the day :- Burst one’s buttons

Usage, examples and definition of the Idiom :-

Colloquially, the word ‘bust’ is often used instead of the word ‘burst’, as in this expression which means to be proud. When we are proud we stick out our chests. If we stick them out too far our buttons might pop off ! ‘I thought I was going to bust my buttons when I was given a medal,’ Fred smiled.