Vulgar, yes. Violent, of course. But if that doesn't bother you, wow is this movie entertaining! There are tons of pop culture references throughout, too, which is so much fun (for people that catch them). If you liked the first Deadpool, you'll like this one, too.
Deadpool 2 continues the story of the foul-mouthed super hero that has a good heart along with major morality issues. It is definitely a continuation, though, so make sure you've seen the first one and remember it.
Personally, I found this movie to be a little less gratuitous than the first. Many scenes in the first seemed to just be there to push the limits. But this one had the language and violence fit in a bit better. Some people probably liked how over the top it was. But I liked this one much more. It's not kid friendly at all, but slightly closer, I guess.