/oh-see-aych/ n., The Old China Hand, a bar located at 104 Lockhart Road, Wanchai Hong Kong. It is one of Hong Kong's enduring constants, offering 24-hour booze, a plentiful selection of professional and - on weekends - amateur talent and a halfway decent jukebox. Patronised by primarily by expats from the Anglosphere.
Bloke: It's Sunday, I want to get pissed and hit on something.
Other Bloke: O.C.H.!