be careless with
Regardless, the Chinese idiom, Pinyin is B ù Gu ǎ Nb ù g ù, which means not taking care of people, also means acting rashly, regardless of others. It's from vanishing.
The origin of Idioms
"Why did she give her love to this lonely and cold Zhai Ziqing, which is so infatuated, so warm and so indifferent?"
Idiom usage
In spite of the presence of an outsider, he came in regardless.
be careless with