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2.
To slap leather is to break out the bill fold and lay down some dollars
If you want to ride like the big dogs, you gotta slap leather home boy!
by Johnny D April 12, 2006
 
1.
To pull out your gun in a gunfight. It comes from the Old West, where gunslingers carried pistols in leather holsters.
"Don't ever slap leather with Clint Eastwood."
by sublimeade September 02, 2008