This means your cat could be coming into it's heat.
The animal is content and happy
When a cat licks you while purring, it is a sign of affection and bonding. Cats use licking as a way to groom and show their love towards their owners. The purring indicates that the cat is content and happy in your presence.
Snakes will vibrate their tails as a warning. In this case it would mean that the female snake does not want the male to approach, and may see him as a threat.
If he wags it and is panting, he is most likely happy. If he is wagging it straight in the air, hunched over, and growling/snarling, he's pissed.
"astute" and "acuminous" are fairly close to "knowledgeable" in meaning.
Tail wagging in dogs typically signals happiness, excitement, or a positive response. In cats, it can indicate different emotions, such as agitation, excitement, or even aggression, depending on other body language cues. Understanding the context and accompanying behaviors can help determine the meaning behind the tail wagging.
This is called bruxing, and it has a similar meaning to a cat purring.
It is a system of signalling. Probably best known from using devices such as flags for sending signals
It means that the cat is purring very loudly, like a boat's motor.
It means it likes you, or wants something. It is generally thought purring is a sign of contentment, or relaxation.
If by chills you mean it vibrates when you pet it that's a good thing it's like purring
The reason dogs wag their tails is because they are happy. Sometimes they are aware of their tail wagging and some time they are not. Kind of like when we smile! :) it can also mean that there really exited about something.