It's a very common word in Argentinian Spanish. It means “Cute or adorable”, said in a cute way too! It's usually more used with the expression “So cute!” (“¡Más Chu!” in Argentinian slang.)
–My boyfriend made a whole song for me.
–So chu!
–“Mi novio me hizo toda una canción para mí.”
–“¡Más Chu!”
–So chu!
–“Mi novio me hizo toda una canción para mí.”
–“¡Más Chu!”
by Nya404 October 18, 2020