Xenosmilus is an extinct genus of homotherin machairodontine (saber-toothed cat) that was discovered in Florida in 2001.

[1][2] Two fairly intact specimens were found by amateur fossil hunters in 1983 (1981 by some sources) in the Haile limestone mines in Alachua County, Florida.

Xenosmilus broke these groupings by possessing both stout muscular legs and body, and short broad upper canines.

[2] Xenosmilus has also been theorized by some to have hunted via a "bite and retreat" strategy using its teeth to inflict deep wounds because of the way its canines and incisors could operate as a unit during a bite, leading to Xenosmilus bearing the occasional moniker of "cookie-cutter cat".

[14][3] Studies published in 2022 suggest that Xenosmilus and other machairodonts such as Smilodon were also capable of efficiently removing meat from a kill without damaging their teeth, as evidenced by bite marks on the bones of Platygonus.

This same study also suggests that machairodonts could consume at least smaller bones when feeding, similar to lions.