not half idiom UK informal
（加强肯定语气的口语表达）非常，很
used in spoken English to express a positive statement more strongly
It wasn't half crowded in the club last night (= it was very crowded). 俱乐部昨天晚上人满为患。
She didn't half shout at him (= she shouted a lot at him). 她冲他大喊大叫！
"You enjoyed yourself last night, didn't you?" "Not half !" (= Very much!) “你昨晚玩得很开心，是不是？”“非常开心！”