The following phrase was used in an old episode of "In the Heat of the Night" starring Carroll O'Connor.

Slicker than Deer Guts on a Doorknob

A very unpleasant way of saying that someone is excessively suave and polished. This can be used in either a derogatory or a neutral sense.

The next show on was "The Waltons" involving the arrival home of Grandma Walton after she had been hospitalized for a stroke (Ellen Corby had suffered a stroke in real life).  Ma Walton sensed that Grandma was unhappy about how everyone was treating her.  She used the term "mollycoddling".