0 behaviour, especially by a man, that is intended to show how powerful and strong someone is:
There was chest-thumping by House Republicans, who boasted that they had blocked the Democrats at nearly every opportunity.
1 used to describe behaviour that is intended to show how powerful and strong you are, or a person that behaves like this:
This display of chest-thumping triumphalism was most unseemly.
chest-thumping 14-year-old boys
