perfidy 

"treachery, basically"

"someday Olaf's perfidy will end."

perfidy by phantomdweeb October 11, 2018

Perfidy 

The chief export of France

The perfidy of the French is well known.

Perfidy by Swampthing500 July 7, 2009

perfidious 

deceitful, treacherous, faithless, tending to betray

Billy is a very perfidious boyfriend.

perfidious by cumtome December 18, 2008

perfidiotic 

When you are both perfidious and idiotic.

Perfidiotic Albion is crashing out of the EU without a deal, causing enormous self-harm just to show its contempt for other countries!

perfidiotic by Bdelygmia July 23, 2020

perfideous

Deliberately faithless and treacherous.

Perfideously debaucherized scumbaggery!

perfideous by Pinkhot August 20, 2017

perfidiosyncrasy 

A lie so completely fabricated and insane it turns out to be true.

I told my grade school friends I’d traveled to the future. A classic perfidiosyncrasy, they asked me who was president. Donald Trump, i lied. They didn’t believe anything I said after that.

perfidiosyncrasy by Nonsensicalme December 23, 2018

Perfidiousity 

An act of being straight deceitful and unable to trust one's words or actions.

This is prompted by someone who can not get their way like throwing a temper tantrum. They operate out of a double standard. This is no CAP.

When I told you that my mind changed you showed all perfidiousity, that took my by surprise .

Perfidiousity by Pineapple Twist June 8, 2025