pocopene

Just wait till you know the etymology of mastodon: https://en.wikipedia.org/wiki/Mastodon

Edit to save a click: "A mastodon, (from Ancient Greek μαστός (mastós), meaning “breast, and ὀδούς (odoús) “tooth”)”

Edit 2: the “mast” in “mastodon” is the same one as in “mastectomy”