old chap noun2 •(UK, old-fashioned) Affectionate term of address for a man.‘Well, look here, old chap,’ he said, ‘let's have strict business between friends. If you'll pay me back four quid at the end of term, you shall have the two pounds. How does that strike you?’ — 1903 •(UK, informal) The penis.Withnail: You fill this with piss, take this pipe down the trouser, and sellotape this valve to the end of the old chap. Then you get horribly drunk, and they can't fucking touch you. — 1987 formsold chaps
