Crossword Genius

Fond of boasting (5)

Ross

I believe the answer is:

gassy

(Other definitions for gassy that I've seen before include "Carbonated" , "Verbose" , "Fizzy" .)

I've seen this clue in the Newsday.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.