I have this guy friend, and I've known him since 4th grade, but today he gave me a hug and grabbed my butt! What does this mean?

He likes your butt and just got the balls to grab it.
Hell prob start grabbing you other places soon if he figures out you just let him grab you.
Then hell proceed to try to have sex with you.

He may like you a lot more than you think.

He's "testing the waters" Hes trying to see if you'll let him...you know..

He probably likes you. If you feel uncomfortable with it, stay away from him or tell him you don't like him "that way".

Because you've known him for years then he feels comfortable doing that even though it is extremely rude, violating and, if I were you, against principles of friendship. :(

He's probably just trying to get some, and he thinks you may be willing to

That actually doesn't always mean he likes you. Usually if the guy has any manners he won't do that if he likes you. Butttt out generation is a piece of crap so maybe he does.

It doesn't mean he like you. I think he's probably want to try some from you.... You know, guys are somehow like that.

Maybe it was an "accident" and was the only way of hinting "love." If I was you right then and there, I would've kicked him in the b***. Well, only because my guy friend would do something like that too, but of course, he'll regret it.