Cutlass

A cutlass was a type of sword.

The Tenth Doctor described himself as a "dab hand with a cutlass" when he used one to try and hold back two Cybermen. (TV: The Next Doctor)

Amy Pond once used a cutlass to fight off the entire crew of the Fancy when they wanted to make the Eleventh Doctor walk the plank. (TV: The Curse of the Black Spot)

The mad Sontaran colonel Snathe owned a cutlass which he almost used to behead the Tenth Doctor. (COMIC: The Betrothal of Sontar)