Forget shaking hands, it seems that the new way to greet someone is to bump fists.
This fashionable alternative to the handshake is used by everyone from President Barack Obama to the Dalai Lama.
Now scientists have found that is better than the traditional greeting because it reduces the spread of germ.
A study at Aberystwyth University found that using a “fist bump” instead of a handshake could reduce the spread of bacteria and viruses by up to 90 per cent.
Faster methods of greeting mean less skin surface area is exposed, reducing the chances of bacteria spreading from person to person.
The study could also have wider implications, claimed Dr Whitworth, especially in hospitals and schools.
Do you think the fist bump will catch on?
If you are having trouble understanding the fist bump here is a short video to help you out.