The term Last Resort usually refers to an action that is used only when no other option remains.

An action of last resort can be

• Using Weapons of Mass Destruction
• A Collision course
• Initiating Self Destruct
• Scuttling a ship
• Final Surrender or, conversely, launching a suicide attack
• Going to war and, at the farthest extreme, initiating Nuclear War (because it is internecine)

Other meanings:

• Last Resort is a film that was released in 2000 directed by Pawel Pawlikowski, starring Dina Korzun and Artyom Strelnikov. Short description is "When a young Russian woman and her son leave Moscow to meet her fiancé, who fails to show up, she declares political asylum." -
• Last Resort - a shoot'em up released in 1992 for the Neo-Geo system. Extremely difficult (There's a walkthrough available for this game ^*.), its gameplay was heavily inspired by R-Type and its system of pod attached to the player's ship. Its first level remained memorable for its homage to the futuristic Neo-Tokyo depicted in the anime Akira.
• Last Resort is the name of a song by Papa Roach.
• Last Resort is also the name of an English dub episode of Sonic X.
• LastResort (with no space between the words) is the name of a fallback font used in computer systems to display Unicode text.