LESSON 3 · Everyday Expressions & Idioms
Safe Slang Is a Superpower
Slang is the secret handshake of fluency. When you say "that's awesome" instead of "that is very good," native speakers relax around you. But slang comes with risk — the wrong word in the wrong context can embarrass you.

Safe slang has three qualities. It is widely understood across English-speaking countries. It is age-neutral, meaning teenagers and adults both use it. And it carries no offensive undertones. Words like "cool," "awesome," "no worries," and "gotcha" pass all three tests.