buddy-buddy buddy-buddy /ˈbʌdiˈbʌdi/

adjective

1. [Informal] Associated on close terms  ( buddy-buddy [Informal] , chummy [Informal] , thick [Informal] )
   associated on close terms
    A close friend
   a close friend
    The bartender was chummy with the regular customers
   the bartender was chummy with the regular customers
    The two were thick as thieves for months
   the two were thick as thieves for months