If they stay little, I'd say elongated cherry or grape. If they're getting bigger, I'd call it a plum; most of my paste tomatoes are plums. If it's really tapered, I believe the shape is called oxheart.

My guess was a paste tomato of some sort.

That's an oddball to me, but I don't grow paste types. Please post a pic once they are ripening.

Well, pentagon-shaped oranges are a thing...why not tomatoes?

Perhaps a San Marzano: they tend to be long, sometimes with flat sides/angular, have a pointy tip and have that same flair to the sepal. They are know to be the very best of the paste-type toatoes.

If it helps your tomatoes feel less mutant, here are some of my tomatoes:

Sunpeach in the left bowl, Shimmer in the back, Yellow Pear in the front, Striped Roman to their right, and the right bowl has Chocolate Cherry. (The bowl in the back is blueberries ... that would be puny for a tomato.) Do not adjust your screen - none of them are traditional reds; we seem to have a thing about growing different colors of tomatoes.

Striped Roman is a paste tomato and makes great sauces. I grew San Marzano a couple years ago, and the shape and uses are similar.

Maybe Jalapeno Tomato hybrids? Joking. They do have nice hairstyles.

My guess is it's a cross between San marzano and Maglia Rosa, but I can't tell you what it is. I've never seed a blocky bullet-shaped tomato before. You should save seeds. Breeders might be interested.

Did you have F1 hybrids in your garden last year? Did you have a picnic, and maybe tossed a tomato in the garden?

My guess is it's an F2 hybrid and is expressing random traits. The shape is common in 'Stuffing' tomatoes. It's shape can cause large cavities in the interior, like green bell peppers. However, if they don't get bigger, then they wouldn't be great stuffers.

Now, like another post recommended, you could save seeds and stabilize your own. Fun!

@Robert Zone 6A My daughter says that earlier this year, instead of throwing away some dried out organic cherry tomatoes that were purchased from the store she cut them in half and pushed them into the soil in the pots that I had grown cherry tomatoes in last summer. But they were round, orange cherry tomatoes...

I think we found your culprit lol. If they were from the store, organic or not, they would most likely be F1 hybrids. Which, would not come back true to form.

Ps

Or the cherry tomatoes you had last year, if hybrids, could have seeded themselves and come back not true.