1. The act of interfering with something that is not yours, or
2. To alter, change, use, touch, examine or interact in any way with someone else's property or person.

Playing/Joking around with another.
Playing tricks or jokes.
Horseplay.
Misconduct.
Deliberate wrong doing.
To waste time by engaging in aimless activity.

Fucked in the head. No idea about anything. Just Stupid!

Drunk as all fuck.
Stumbling around, picking fights with natives on bicycles.
Shaking everyone’s hand.

You can use the word mess after someone says or does something that's embarrassing, stupid, pathetic, ridiculous, or weird. Honestly can be used after a lot of things. Even sometimes when you don't know what to reply, "mess" might work.
It's so hard to define mess... Mess. Check examples for a better understanding.
Sometimes has a t at the end. (Messt)

An adverb which denotes a lot, quite a bit or very much.

drunk or high