What is Pidarface?
1.
Literally: fagface. A person whose social status and value you consider to be low.
Etymology: Russian "pidar" - fag, and English "face" < VL *facia - the front part of the head, from the forehead to the chin.
Two pidarfaces were playing Prisoner's Dilemma, and they both kept defecting. As a result, the social welfare decreased.
See