If you have no idea what this is, it's a tool you use to start a seam to peel citrus fruits. The little piece at the upper right is a "hook" which, when dragged along the outside of an orange, for instance, Makes a groove in which you can slide the flat left end and get under the skin. This helps peel just the skin and pith off the orange, reducing the loss of pulp and juice.
I was attempting to score an orange and couldn't understand why nothing was happening. I set the orange down and used a spoon to peel back the skin. Then I saw it. Oh man. I have no idea how long I have had this tool, decades wouldn't be too far off of a guess. I don't know what this is called or whether I can get another. The flat end wasn't all that useful to me, but I used the heck out of the other end.
For now, I'll use a spoon but I'll be on the look out for orange openers or whatever might come close to describing this. If oranges just came with zippers...
Beverage: Scottish Breakfast tea