Skunks smell pretty pungent
They are known for their ability to spray the liquid with a strong unpleasant smell.
They can be smelled every on interstates at times
"Skunk" has been used as an insult since at least 1841. Hope no one calls me that!
It can also refer to certain smells outside of the animal
Most skunks are black and white although there are some that are brown or grey and even cream-colored.
They seem to keep to themselves most of the time
Yes and they are omnivorous, eating both animals and plants depending on their environment.