"(Harry, just being greeted by Percy) Harry! said Fred, elbowing Percy out of the way and bowing deeply. Simply splendid to see you, old boy Marvelous, said George, pushing Fred aside and seizing Harrys hand in turn. Absolutely spiffing. Percy scowled. Thats enough, now, said Mrs. Weasley. Mum! said Fred as though he'd only just spotted her and seizing her hand too. How really corking to see you"
Book: Harry Potter And The Prisoner Of Azkaban Hands up who wishes Fred and George were your best friends? They always cross the line, they're really good at impressions and for some reason, the word 'corking' really tickles your pickle.