pukka \PUHK-uh\ (adjective) - 1 : Authentic; genuine. 2 : Good of its kind; first-class.
"Thinks he can cauk the dam in a fortnight. Look at his marginal sketches -- aren't they clear and good? I knew he was pukka, but I didn't know he was as pukka as this." -- Rudyard Kipling, 'The Day's Work'
Pukka comes from Hindi pakka, "cooked, ripe," from Sanskrit pakva-, from pacati, "he cooks."