Iftikhar Ali Khan Pataudi.
This is Sir Neville Francis Fitzgerald Chamberlain, the Oxford Dictionary of National Biography has the following about a famous claim that he had.
“While serving at Jubbulpore in 1875 Chamberlain developed a new variation of black pool by introducing coloured balls into the game. It was dubbed ______ a derogatory nickname given to first-year cadets studying at the Royal Military Academy at Woolwich that Chamberlain had heard about from a young Royal Artillery subaltern visiting the mess. Chamberlain later retorted to a fellow player who had failed to pot a coloured ball: ‘Why, you’re a regular ________’. While explaining the term to his fellow officers Chamberlain, to mollify the officer concerned, remarked that they were all ‘_____ at the game’ and the name _______ or _______’s pool immediately stuck.”
Fill in the blank.