offhand

a. 即時的、即席的、無準備的、隨便的、簡慢的、不友好的

adv. 即時地、即席地、隨便地

英文釋義

1. with little or no preparation or forethought
2. casually thoughtless or inconsiderate
3. without previous thought or preparation
4. in a casually inconsiderate manner