Definition of Kilroy
: an inveterate traveler like the roamers Kilroy and Ulysses — Peter Viereck; especially : a transient soldier of all the Kilroys of history who have passed through here … it was Napoleon who best summed up the strategic importance of Malta — J. P. O'Donnell
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Origin and Etymology of kilroy
after Kilroy, mythical soldier of World War II whose name was inscribed in unlikely places all over the world by American soldiers
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