gallows humor 

Sense of humor that arises from stressful, traumatic or life-threatening situations where death seems to be an inevitability. Different from black humor in that comments of this sort are made by the person/persons affected (i.e. about to die).

Emissary: We will block out the sun with our arrows.
Spartan (gallows humor here): Then we will fight in the shade.

gallows humor by bobblehead bob March 11, 2007

Gallows Humor 

The art of making comedy in a situation of helplessness or hopelessness.

The only escape from your worthlessness in the world.

Man, my gallows humor was really showing today.

Gallows Humor by Samsational Punlord October 20, 2019