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1. A close friend who accompanies his buddies in their activities
   - brother, chum, crony, pal, sidekick, compadre, paisano [US]
    
2. An informal and friendly term of address to a stranger
   - mate

1. Form small teams, especially pairs
   - buddy up
    
2. Be friendly towards someone; become friends with someone
   - buddy up

Derived forms: buddied, buddying, buddies

Type of: friend

Encyclopedia: Buddy Buddy, Can You Spare a Dime? Buddy, can you spare a dime