Avoiding a handshake is a polite way to decline physical contact without causing offense. It can be done in a variety of ways, including offering an alternative greeting such as a nod, a bow, or a fist bump. In some cultures, it is also acceptable to simply say “no thank you” when offered a handshake.
There are several reasons why someone might want to avoid shaking hands. Some people may have a medical condition that makes it difficult or painful to shake hands. Others may simply be uncomfortable with physical contact. Additionally, some cultures or religions may have specific rules about when and how handshakes are appropriate.