Oxford English Dictionary: poncey, poncy, adj., derogatory slang (chiefly Brit.). Affected, pretentious, self-consciously refined or superior; overly fancy or elaborate; effeminate, homosexual.

Guido has just spoken to Nige in a boozer in Wales:

“The PM’s basically using ‘poncey’ in the sense of an affectation. Where does the Old Etonian park his car? In a garaaahge? In a garage or a garrige?”

Odd jibe from “Call me Daaave”….