
This scene is from Lovely Runner (선재 업고 튀어), Episode 12. Im Geum (Sol's older brother) and Lee Hyun-ju have been dating in secret. Then, oops. Everyone finds out, and the dinner table turns into total chaos.
Geum tries to make a deal with Sun-jae, and Sun-jae politely refuses.

Geum"Look at you, talking back to me, your hyung-nim!"
Learning Point
말대꾸하다 = to talk back
따박따박 = point by point, answering back every word
형님 = an honorific term for an older brother or a respected older male, depending on context
Geum calls himself 형님 because he's Sol's older brother.

Sol"How dare you act like Sun-jae's big brother?"
Learning Point
감히 = dare to; how dare you
You use it when someone's behavior feels out of line or unacceptable. Here, Sol is strongly calling out Geum.

Hyun-ju"How can you say 'How dare you'? He's still your older brother! You have no manners at all!"
Learning Point
버르장머리 = manners, particularly when referring to someone's rude or disrespectful behavior
버르장머리가 없다 = to be ill-mannered; to be disrespectful
Hyun-ju is scolding Sol for talking rudely to Geum.

Sol"Man-ners?!"
Learning Point
버르장머리 sounds much more scolding than the everyday word "manners."

Sun-jae"Calm down. Just calm down..."
Learning Point
열내지 마 = Don't get worked up. / Don't get angry.

열내다 literally means "to raise heat," so he's cooling her down. Literally.
Word #1 감히 (gamhi)
감히 means doing something you have no right to do. When someone says it to you, they're basically asking, "Who do you think you are?" Closest English: "How dare…"
You'll hear it in dramas like this:
Eodi gamhi! – How dare you!
Gamhi nega? – You? How dare you?
Now look at the comic again. Sol says Sun-jae is above her brother, so gamhi. Hyun-ju says the brother is above Sol, so gamhi right back. Same word, flipped rankings. That's why this scene is so funny.
Plot twist: 감히 has a polite side, too. Point it at yourself, and it becomes humble.
Gamhi malsseumdeurijamyeon… – If I may humbly say so…
You might actually hear this one in a meeting. So 감히 isn't rude by itself. It all depends on who you point it at.
Word #2 버르장머리 (beoreujangmeori)
버르장머리 is a belittling way of saying 버릇 (beoreut), which means habits or manners. 버릇 is plain. 버르장머리 comes with an eye-roll.
Beoreusi eopda. – You're rude. (firm, but okay)
Beoreujangmeoriga eopda! – You have NO manners! (ouch)
It's what parents or grandparents say when scolding a child. That's exactly why Sol froze. Getting this from her brother's girlfriend? Brutal.
So, can you use it? Honestly... no. Just learn to recognize it. When a drama character says 버르장머리, grab your snacks. A big fight is coming.
Korean isn't just about what you say. It's about how you say it!