jactarse
= boast, brag, crow, bluster.
Ex: In fact, he boasts that he knows more about library work than all of us who have our master's degrees put together.
Ex: While pirates and ancient mariners may have bragged about sailing the seven seas, the phrase is merely figurative.
Ex: New York City is crowing about the long-awaited arrival of a new biotech park.
Ex: Low key and humble, he would never be the type to grandstand and bluster about injustice.