unctuous

Moreover, the script transitions him, through Finan’s effective performance, from a gawky, bespectacled nerd putting on airs, into an unctuous political predator.

Trump is naturally very pleased with this unctuous display of sycophancy.

His duke is a spasm of nervous tics and shifty glances, of unctuous charm and feigned candor.

Chicken drumsticks simmer in a sticky sauce; a whole fish sizzles in a frying pan; an unctuous golden curry bubbles.

The only question then, Eugene Robinson of the Washington Post wrote, "is which of the contenders will be most unctuous and self-abasing in defense of Donald Trump?"