noun, masculine/aˌbwelo θeboˈʝeta/plural: abuelos Cebolleta
an old man who is fond of telling stories
“Nuestro abuelo Cebolleta ha entrado con honores en esta nueva antología no por méritos propios, sino de los magistrados que le juzgaron.” — Our abuelo Cebolleta has entered, with honors, into this new anthology, not on his own merits, but on those of the magistrates that judged him.
From the Spanish comic series La familia Cebolleta. The grandfather in this family, nicknamed abuelo Cebolleta, was always trying to tell his family his fantastical batallitas and war anecdotes.