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Johnny-on-the-spot

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noun John·ny-on-the-spot \ ˈjä-nē-ˌȯn-t͟hə-ˈspät , -ˌän- \

Definition of Johnny-on-the-spot

:a person who is on hand and ready to perform a service or respond to an emergency

First Known Use of johnny-on-the-spot

1896

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