I hate to ruin this frivolity
Long ago, I was introduced to a book of manners:
The Unexpurgated Code: A Complete Manual of Survival & Manners by J.P. Donleavy
He used a term "Pukka"
puk·ka also puck·a (pk)
adj.
1. Genuine; authentic.
2. Superior; first-class.
[Hindi pakk, cooked, ripe, from Sanskrit pakva-, from pacati, he cooks; see pekw- in Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fourth Edition copyright ©2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
pukka, pucka [ˈpʌkə]
adj (esp in India)
1. properly or perfectly done, constructed, etc. a pukka road
2. genuine pukka sahib
[from Hindi pakkā firm, from Sanskrit pakva]
Collins English Dictionary – Complete and Unabridged © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003
One of his examples:
On the occurance of smelling a Fart in a close elevator:
[Goofus]: I want outta here, Pronto!; or, in Pukka,
[Gallant]: I say, that is uncommonly foul.