(not) give sb/sth a thought

not think of, or about sb/sth at all

She took a quick look around to check who saw but Wallace
looked down and she didn't give him a thought.  Google

All of you just went on
with your lives and didn't give him a thought. Google

One of the passengers was a large gentleman, but I didn't give
him a thought until the stewardess asked everyone their weight. Google

» EDUCATION