bent on causing trouble.


example - "he has an ill set mind"

A Troublemarker


e.g. - "he's a bad egg that one!"
A way of saying the person in question was acting in a distasteful way.

ur gonna get emptied so bad you'll be in hospital......SON
Go away you silly person

to lose the head is to lose control in anger


"mate! will you just back of before I lose the head!" 

An invitation to man to man combat.
What you say does not make very much sense


I will smash your face in