Top Definition
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.
by MarcusHasMassiveTekkers February 20, 2011

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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...
by MarcusHasMassiveTekkers February 14, 2011

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt