Definition of slicks:
(adj) :
Slippery or smooth due to a covering of liquid; often used to describe appearances.
(adj) :
Sleek; smooth.
(adj) :
Appearing expensive or sophisticated.
(adj) :
Superficially convincing but actually untrustworthy.
(adj) :
(often sarcastic) Clever, making an apparently hard task look easy.
(n) :
A covering of liquid, particularly oil.