back-slapping

noun

1. the practice of making a loud and effusive display of friendliness, cordiality, etc., as by slapping persons on the back.

verb (used with object), back·slapped, back·slap·ping.

1. to subject to backslapping.

verb (used without object), back·slapped, back·slap·ping.

2. to engage in backslapping.

noun

3. a hearty slap on the back given as a token of affability or congratulation: The bridegroom received many a warm handshake and backslap.

adjective

1. energetically jovial; hearty