not think of something/of doing something
not think of (doing something)
1. To not conceive of the idea of doing something. Ah, I didn't think of restarting the computer to fix the issue. I'll try that now. When I asked him why he didn't just use his spare key, he said he just hadn't thought of doing that.
2. To refuse to consider doing something. I wouldn't think of getting a tattoo like that on my neck! We won't think of agreeing to a deal that is so ethically questionable.
3. To not remember to do something. Sorry, I didn't think of getting milk while I was at the store.