Dujetski
The worst form of lying. It is characterised by all of the following: lying through one's teeth with extreme conviction, being unrepentant when caught lying, unforgivingly faulting you for believing his lies.
One of Rodruggie's many dujetskis is that he will solve the drug problems in three months. Another dujetski he uttered was that he would defend the country's patrimony. Instead, he chose to a foreign lapdog in exchange for a measly sum.