This phrase is a reminder to not be overly boastful or prideful. It encourages humility and modesty, and reminds us to be humble and not let our successes go to our heads. It is a reminder to stay humble and not let our accomplishments or possessions define us.
From Wikipedia
Don't Be Tardy... is an American reality television show that premiered on Bravo on April 26, 2012, as Don't Be Tardy for the Wedding. Developed as the first spin-off of The Real Housewives of Atlanta, featuring Kim Zolciak-Biermann, her husband Kroy Biermann and the couple's children, with chef Tracey Bloom and nanny Berta.