Could you give me some expressions that can be used instead of "free of charge"?

What's the difference between "pal" and "friend"?

"Pal" is a synonym for "friend," but is considered to be slang. It is more often used by older people or in situations involving sarcasm, like in this video here. Similar expressions include "buddy" or "bud." Ex: John and I have been pals for thirty years. Ex: Get in line, pal. No cutting.

What does "dig" mean?

The word 'dig' has various meanings, but in this context, it means 'to really enjoy or like'. It is a common word used among younger generations. Ex: I dig your house. Ex: I dig the new BTS album. So, in this case, the speaker says "I dig your man cave." it means that he really likes the owners' man cave.

What does "head" mean here?

When Phoebe says "I am the head" she is referring to the head of the photo (Ross's head). She is jokingly making the photo come to life by pretending to be Ross. She is teasing Ross because she thinks it's funny that he would give a photo to his son so he won't forget him.

What does "crush on someone" mean?

Having a crush on someone means you are interested in them romantically and likely want them to be your boyfriend or girlfriend. A similar expression, used in the right context, is saying you "like" someone. Ex: A: I saw you talking to that boy, what's going on? B: Don't tell anyone, but I've liked him for years.

What does "face" mean as verb?

"Face" as a verb can have multiple meanings. The first is to be positioned so that your face or the front of something is pointed directly towards something. Ex: They were faced towards the ocean when they saw the tsunami. Ex: The house faces north. The second meaning of the verb "face" is to confront or deal with something challenging. In this situation, "face" has the second meaning. When he says "facing my problems" he means dealing or handling his problems directly instead of pretending they don't exist and ignoring them. Ex: You need to learn how to face your fears. Ex: I don't know how to face her death.