"chummy" in the adjective sense

1. chummy, matey, pally, palsy-walsy

used colloquially) having the relationship of friends or pals

2. chummy, buddy-buddy, thick

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"

Source: WordNet® (An amazing lexical database of English)

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