Green’s Dictionary of Slang

caesaration! excl.

[proper name Julius Caesar + sfx -ation, on pattern of botheration! excl.]

(US) a mild oath.

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[UK] press cutting in J. Ware Passing Eng. of the Victorian Era 60/2: ‘Ow! ow! Caesaration! I’ll kick the head off you !’ he roared, catching hold of a fence and glaring at the boy.