Definition of Kilroy in US English:

Kilroy

proper noun

  • A mythical person, popularized by American servicemen in World War II, who left such inscriptions as “Kilroy was here” on walls all over the world.

Origin

Of the many unverifiable accounts of the source of the term, one claims that James J. Kilroy of Halifax, Massachusetts, a shipyard employee, wrote ‘Kilroy was here’ on sections of warships after inspection; the phrase is said to have been reproduced by shipyard workers who entered the armed services.

Pronunciation

Kilroy

/ˈkilroi/