not think of something/of doing something
not think of (doing something)
1. To not come up with the idea of doing something; to not remember to do something. Ah, I didn't think of restarting the computer to fix the issue. I'll try that now. Sorry, I didn't think of getting milk while I was at the store.
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 deal that is so ethically questionable.