Bad intentions or bad luck, depending on the context. A person with mala leche is someone who does things with malice, while having mala leche means the universe is conspiring against you.

A person who snitches, betrays, or sells out their friends at the first opportunity. The rata is the group's snitch — the one who spills secrets, passes info, and stabs you in the back without remorse.

To obsessively check someone's social media — scrolling through old photos, reading their tweets, and tracking their every move. Everyone's done it, but nobody wants to admit it.

An annoying, pestering person who will not leave you alone. In Argentina, you call someone "gede" when they are constantly on your case, bugging you nonstop about something, like that friend who keeps insisting until you give in.