Someone who is devious, cheeky and very naughty. Because of these almost
superhuman levels of deviousness, the actions of a 'slippery customer' cannot be easily controlled. Such characters can cause complete
carnage in many different situations (
any day of the week). A 'Slippery Customer' is certainly not a valued member of society. In some cultures, using such a term to describe someone is the deepest form of insult.
Who is that
sneaking off into
the cafe toilets?
I'm not sure, but i've heard he's a seriously Slippery Customer.
People like him have certainly
derailed from the road to glory...