Definition
A 'last resort' is the final option when all else has failed. Think of it as Plan Z, the one you only use when A through Y didn't work. It's often risky or undesirable, but necessary to avoid a worse outcome. It's like using your emergency snack stash when you're absolutely starving π«. It implies desperation and a lack of better choices. Using it suggests the situation is serious and urgent. It is not something you use flippantly, but when truly needed.