What is Rat Pack?
1.
Collective name of several top entertainers who were known to pal around, and party, during the 1950s and 1960s. The recognized leader was singer/actor Frank Sinatra, and the group (Famous for its Vegas shows, done while filming Ocean's Eleven) consisted of other top talents, Dean Martin, Sammy Davis Jr., actor Peter Lawford, and Comedian Joey Bishop.
The Rat Pack helped in raising funds for JFKs election.
2.
To Jump Or Gang Bang a Person. To Beat Someone Down With Your Friends
A look!! that niggas catching a rat pack.
See
3.
1. Legendary Hollywood group of the '50s, noted for what then passed for glamorous decadence.
2. Any group prone to pally misbehavior.
Dean Martin and Sammy Davis Jr. were members of the Rat Pack