OFFHAND, OFFHANDEDLY
ADJECTIVES
1609 ► AIRY of a person or a person’s character, etc.: superficial, shallow; later: nonchalant, offhand; dismissive
1885 ► OFF-SIDED offhand, casual → Sc.
1917 ► JAKE-EASY → JECK-EASY offhand, easygoing → Sc.
ADVERBS
1922 ► OFFLIKE casually, offhandedly → Amer. dial.
VERBS
1922 ► HIGH-HAT to treat a person in a snobbish or offhand way → colloq., chiefly US and Can.
Lexicophilia 