a phrase that people sometimes write on walls, etc. for no obvious reason. It was first used in World War II , but it is not known who Kilroy was, or even if he was a real person.
KILROY WAS HERE
Meaning of KILROY WAS HERE in English
Oxford guide to British and American culture English vocabulary. Руководство по британской и американской культуре, Оксфордский английский словарь. 2005