not give something a second thought1 to not think or worry about something at all 根本不想某事;毫不担心某事 The matter didn’t seem important, and I hardly gave it a second thought. 这件事情好像并不重要,所以我几乎没有多想。
→ not give something a second thought/another thought at give1(8)
2 used to say that someone does not think or worry about something 对某物不加考虑;对某事毫不担心 She dismissed the rumour without a second thought. 她对这个谣传不屑一顾。
→ not give something a second thought/without a second thought at second1(6)