Go to the mattresses informal verb phrase
To go to battle or war or prepare for a lengthy war or battle; to adopt a warlike position
My uncle went to the mattresses and fell in battle.
We were about ready to go to the mattresses with the neighboring country.
Used to indicate that opposing groups of people are clearly distinguished and ready to start fighting or arguing with each other
Used to describe using something as a weapon to fight with someone or something.
Used to refer to a fight or quarrel
To make an all-out effort to battle against someone or something.
To take part in a contest, a battle, or conflict. Normally, followed by "with someone or something."
The verb "go" should be conjugated according to its tense.
The phrase turns on the association in Italian folk-memory of mattresses with safety in wartime. People did not know the phrase outside of the USA and Italy. Until the Godfather film was published, the phrase became more popular.
To bear too many problems or responsibilities
I am carrying the weight of the world on my shoulders as I am the last participant who will to win or to lose our team.