Ostentaban (en. They boasted)

/ostentan/

Slang Meanings

To show something in an exaggerated manner.
At the event, everyone was talking about the guests' ostentation.
En el evento solo se hablaba de la ostentación de los invitados.
To brag about a life of luxury.
That girl is always showing off on Instagram.
Esa chica siempre está ostentando en Instagram.