self-aggrandizing

/S EH1 L F AE0 G R AH0 N D AY0 Z IH0 NG/
adjective
  1. 1

    Boastful; intended to make oneself seem more important.

    โ€œHis self-aggrandizing talk alienated his colleagues, who had done the work he claimed credit for.โ€

Source: https://en.wiktionary.org/wiki/self-aggrandizing