[bak-slap-ing] 
| the practice of making a loud and effusive display of friendliness, cordiality, etc., as by slapping persons on the back. |
[bak-slap] verb, -slapped, -slap⋅ping, noun | 1. | to subject to backslapping. |
| 2. | to engage in backslapping. |
| 3. | a hearty slap on the back given as a token of affability or congratulation: The bridegroom received many a warm handshake and backslap. |
| back·slap (bāk'slāp') v. back·slapped, back·slap·ping, back·slaps v. intr. To demonstrate effusive goodwill. v. tr. To demonstrate effusive goodwill toward (another or others). back'slap'per n. |
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