When a very curious asian man sees a tall white caucasion american man, grabs his junk and evaulates his own self worth.
So my boss was in Hong Kong, and his boss had many drinks (and a tiny penis) asked him how big his junk was. My boss ignored this and kept talking. When he got up from the table, his boss acted like he was going to shake his hand, and then grabbed his junk instead, and said "ooooOOOOO". There you have it, the Hong Kong Handshake.
A long hug, usually on MTR (rapid transit railway system in HK), when you and your partner are playing on portable game consoles or smartphones while holding each other.
Aw, I finished 3 races in Mario Kart 7 when we had a Hong Kong hug.