/ˌɒfˈhænd; US ˌɔ:f- ||; ˈɔfˈhænd/adj (used about behaviour) not showing any interest in sb/sth in a way that seems rude （指行为）不礼貌的，简慢的: an offhand manner/voice简慢的态度╱说话声
offhand²
/ˌɒfˈhænd; US ˌɔ:f- ||; ˈɔfˈhænd/adv without having time to think; immediately 不经考虑；立刻；即席: I can't tell you what it's worth offhand.我不能立刻告诉你这东西值多少钱。