Not in any textbook
Super Casual English
The English your textbook is afraid of. Slang, banter and yes — swearing — taught properly: what it really means, how strong it is, and when you can (and really can't) use it.
Heads up: strong language ahead
These lessons contain real swear words and rough expressions — that's the whole point. If that's not your thing, my regular lessons might be a better fit.
No worries, mate!
"It's all good — don't worry about it."
Friendly British casual. Safe with almost anyone outside formal business settings.
That's sick!
"That's amazing!" — yes, sick means GOOD here.
Young-people slang. Sounds natural with friends; confusing in a boardroom.
What the hell?!
"Huh?! What's going on?!" — surprise or annoyance.
Rough but extremely common. Fine with friends, risky with your boss.
Fuck yeah!
Maximum-level excitement — "YESSS!"
Very strong. Friends only, never at work — but you'll hear it in every action movie.
Fuck you!
The strongest insult in English.
Between close friends, with the right tone, it can be a joke. With anyone else, it starts a fight. Learn it to understand it — use it almost never.
That's bullshit.
"That's a lie / totally unfair."
Strong complaint about unfairness. Common in real life and film — not for the office.

Real situation, real English — every lesson breaks down scenes like this one, line by line.
English your teacher never taught you
- Slang natives actually use today
- Swear words — and how strong each one really is
- Joking, banter and comebacks with friends
- Movie, music and social-media English