por nada

por nada (not comparable)

1. Used other than figuratively or idiomatically: see por,‎ nada.
2. not at all; you're welcome

• de nada

por nada

1. not at all, you're welcome

   Synonym: de nada

2. (literally) for nothing, for anything

• “nada”, in Diccionario de americanismos [Dictionary of Americanisms] (in Spanish), Association of Academies of the Spanish Language [Spanish: Asociación de Academias de la Lengua Española], 2010