An erection caused by dining on something delicious. Occurs most often when having a great meal for the first time a long while. Also appears when you least expect it, and is hard to control if you are enjoying your dish quite slowly.
I hadn't eaten Subway in so long, and I was missing my buffalo chicken special. I got one tonight and I took one bite and could not believe how perfectly toasty and warm and fresh everything was on it this time, that I ended up getting a food boner. Never has a sub gotten me hard like this before!