"companionable, sociable, intimate," 1874, from chum (n.1) + -y (2). Related: Chumminess. Previously it was a noun, a common name for a chimney sweep, as a corruption of chinmey.
the bartender was chummy with the regular customers
chucklehead
chuff
chug
chukker
chum
chummy
chump
chunder
chunk
chunky
Chunnel
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