use bad language
swear
people whose behaviour it is good to copy
role models
not worth doing
a waste of time
cause somebody problems
mess somebody around
behave badly without being punished
get away with ...
have a secret plan
have a trick up your sleeve
do something because everything else has failed
do something as last resort
changing attitude to the world
new outlook on life
deliberately frighten or threaten someone
bully
have a good relationship
get on well
spend time doing nothing
hang around
causing problems
disruptive
badly-behaved children
spoiled brats
a former policeman
ex cop