Does the word "rein" have the same meaning as "role?"

What does "doing skulking" mean?

As a noun "skulk" is actually used to refer to a group or pack of foxes. The verb "skulk" means to hide or move around as if trying not to be seen, usually it is used to mean that the person has bad intentions. Probably coming from the idea that foxes are sly and sneaky. In this clip the two characters who are trying to buy the popsicle are both foxes. This word was probably chosen both to give the idea that the elephant thinks they are trying to do something wrong, that they have bad intentions and as way to emphasize that they are being judged/stereotyped for being foxes. Ex: The thief was caught skulking in the shadows. Ex: The panther skulked through the bushes. Ex: There is a skulk of foxes in the forest.

Why is it not present perfect tense?

This sentence is not in the present perfect tense because it is an old-fashioned way of speaking that originates from Great Britain. In modern English, we would say, "Have you ever seen such a beautiful dress?"

I thought "how much" is used for asking price of something. What does "how much" mean here? How can I use this expression in other context?

"How much" generally refers to asking the amount of something. This can be the price, weight, or anything else of numerical value. Ex: How much rice did you buy? Ex: How much do the train tickets cost? However in the case of the video here, "how much" is used to mean "to the degree that", which implies that something is a lot or a great degree. In this case, "how much" still refers to the "amount" of something as it means "a lot", but it is used differently. Ex: A: What are you thinking about? B: How much I wish I could quit my job. Ex: I can't stop thinking about how much I want a dog.

Can I say "three millennia" instead of "3000 years"?

Although the meaning of "three millennia" and "3000 years" is the same, it sounds a bit wordy and awkward here. "3000 years" sounds most natural in this context, however "millennium" or "X millennia" might sound better in other contexts (for example, when wanting to emphasize certain achievements or historical events). Ex: It was the first earthquake of this millennium. Ex: This is the most significant scientific discovery in over two millennia.

Can you give me more examples of how "kick back" is used in a sentence?

Sure thing! I would say, though, that "kick back and relax" is very commonly used together. Ex: Kick back, relax, and enjoy the ride. Ex: Kick back and make yourself at home. Ex: Jerry likes to kick back on the beach every weekend. Ex: Surely you can just kick back and let the others organize the event?