mystery tomato from where?

Where did this strange tomato come from?  What descriptive words are springing to mind (nipple) when you look at its strange (nipple) form?  This thingy has self sown from my compost but I promise that I have never bought a tomato with a pointy nipply end like that.  Okay, I’ll stop saying nipple.  No its not funny, well maybe a little if you say it out aloud 😉