chummy Meaning, Definition & Usage

1. adjective satellite (used colloquially) having the relationship of friends or pals
   matey; palsy-walsy; pally.
   
2. adjective satellite (used informally) associated on close terms
   thick; buddy-buddy.
   
   • a close friend
   • the bartender was chummy with the regular customers
   • the two were thick as thieves for months

WordNet