offhandedly

(r) without previous thought or preparation
- couldn't give the figures offhand
- we decided offhand to go to Canada
- she had made these remarks offhandedly
offhand, offhanded,
(r) in a casually inconsiderate manner
- replied offhand, his mind a million miles away
- she threw him over offhandedly without even a Dear-John letter
offhand, offhanded,

offhand offhanded