What does cuatro cosas mean?
Expression
a few bits
Cuatro does not mean four: it means a few. It is a false quantity used to play something down — compramos cuatro cosas, dije cuatro tonterías, vinieron cuatro gatos. Small numbers are constantly used this way in Spanish, and taking them literally is a reliable way of getting lost.
Me acerco al súper a por cuatro cosas.
