offhanded

adverb

1. cavalierly, curtly, or brusquely: to reply offhand.
2. without previous thought or preparation; extempore: to decide offhand to take a trip.

adjective

3. informal, casual, curt, or brusque: an offhand manner.
4. Also off·hand·ed. done or made offhand.
5. Glassmaking. working manually and without the use of molds: offhand blowing.

adjective, adverb Also: offhanded

1. without care, thought, or consideration; sometimes, brusque or ungraciousan offhand manner
2. without preparation or warning; impromptu