Where someone acts arrogantly/annoyingly "pious 'n' preachy" ("I'm as honorable as a parson!") when publicly interacting with others, but is in reality a totally selfish/dishonest jerk in his private actions.
I somehow can never develop much respect for some highfalutin nose-in-the-air who claims to be a religious fanatic, but who also cannot appropriately handle even a simple moral-question situation --- talk about a split parsonality!
Mary exhibits split menu personality syndrome as she places her drive-thru order, "Umm yes I'd like a Number 3 Value meal, super-sized with a small diet coke...oh yeah and add in an apple turnover"
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)