A chase in the school game of “Prisoners' Base” or “Prison Bars.” Probably a gipsy word. One boy sets a chivy, by leaving his bar, when one of the opposite side chases him, and if he succeeds in touching him before he reaches “home,” the boy touched becomes a prisoner.
or Chivvy. Slang for the face. Much slang is due to rhyme, and when the rhyme is a compound word the rhyming part is sometimes dropped and the other part remains. Thus Chivy [Chevy]-chase rhymes with “face,” by dropping “chase” chivy remains, and becomes the accepted slang word. Similarly, daisies=boots, thus: daisy-roots will rhyme with “boots,” and by dropping “roots,” the rhyme, daisy remains. By the same process sky is the slang for pocket, the compound word which gave birth to it being “sky-rocket.”
“Christmas” the slang for a railway guard, as “Ask the Christmas,” is, of course, from the rhyme
“Christmas-card”; and “raspberry” the slang for heart, is from the rhyme “raspberry-tart.”
Then came a knock at the Rory o'More [door], Which made my raspberry beat.
Other examples given under their proper heads.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894