It's been used in my hearing at work today to mean, on the one hand, criminal activity i.e. nicking stuff and on t'other hand mild swearing.
When my kids were at school, one boy hit another hard with a large stick. This was "inappropriate" so too was drinking vodka in the lunchbreak as was my complaint that it might be a good idea to have a first aid kit for a rugby match.
It's time to bin this mealy mouthed word!
Rant over - as you were