D defs.my
Entry 2 senses Webster, 1913

chummy

· IPA /ˈt͡ʃʌ.mɪ/
01 adj. having the relationship of friends or pals.
  1. 1.
    having the relationship of friends or pals.[colloquial]
  2. 2.
    associated on close terms.[informal]
Syn. matey, pally, palsy-walsy. — Syn. -- thick(predicate).