The ultimate form of facepalm; to facepalm beyond all reasoning. So far beyond reasoning that you defy all forms logic and physical understanding. God cringes at the sight of your facepalming pwnage. To facenuke is to admit your shame for there is no greater art of recognizing failure than facenuking.
I just had to facenuke after realizing that the same shirt I bought online, I could have gotten for cheaper at my local store.