Mondegreen of the phrase "holy matrimony" - most likely as a deliberate Freudian slip, to refer to the state of being married and miserable.
Dost thou take this man to be thy awfully dreaded husband?
Dost thou take this woman to be thy awfully dreaded wife?
By the power vested in me by Church and State, I hereby declare thee joined in holy acrimony. What God hath joined, let no man put asunder.
You may now diss the bride. Amen.