the.com/foxhole

A dug-out pit where a soldier shelters from gunfire and shelling during combat.

means A small dug-out pit that a soldier shelters in during combat, and by extension any makeshift refuge grabbed in a crisis.

from Straightforward compound of 'fox' and 'hole' — the literal den a fox digs to hide and shelter in. Soldiers borrowed the image directly: the shallow pits scraped into earth for cover in World War I and especially World War II looked and functioned like an animal's burrow, so the slang stuck and outlasted the trenches it described.

WWII origin
Replaced trenches because artillery got scarily precise
the phrase
No atheists in foxholes is actually disputed by surveys
ideal size
Just big enough for two, cozy with mortality
modern use
Now means any shared crisis bunker, literal or emotional
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