"Pillar" . Intransitive verb. 1 . Argentina. Urinating, pissing ( source : Dictionary of Americanisms - ASALE ) . 2 . The correct spelling of the verb "pillar" is with a double "ll", while "piyar" with "y" is considered a misspelling. "Piyar" does not exist in the dictionary of the Royal Spanish Academy (RAE).