chummy (
http://definr.com/chummy)
adj 1: (used colloquially) having the relationship of friends or
pals [syn:
matey,
pally,
palsy-walsy]
2: (used informally) associated on close terms; "a close
friend"; "the bartender was chummy with the regular
customers"; "the two were thick as thieves for months"
[syn:
thick(p)]