Answer: kilroy

AnswerCrossword Clue
KILROYWWII graffito
KILROY"... was here"
KILROYColleague of Clem and Chad.
KILROY"... was here."
KILROYThe man who "was here."
KILROYUbiquitous G.I.
KILROYUbiquitous man
KILROYHe "was here"
KILROYName in old graffiti
KILROY"... was here" (W.W. II catchphrase)
KILROYFictional character who "was here"