The unfortunate consequence of trying to repair holes in underwear on the cheap. Contrary to the apparent image presented by the word, one does not staple his dick; rather, he staples the hole in the underwear correctly, but proceeds to get stabbed by the staples within. Often painful though, fortunately, rarely disastrous.
I noticed a split in my boxers down the seams and tried to fix it in my office with office supplies. Now I have stapledick.