WOP, means without papers. Many Italian and other immigrants did not have the proper papers to immediately enter the US, so they were marked WOP in chalk, and routed to different areas for processing. The term is considered derogatory by many of Italian heritage.
My Italian grandparents both had passports, but still were subject to scorn, as I was as a youth, even though my parents were born here in the US.
At any rate, I took your comment as a joke, but darn it, please throw in a smiley face, dude. No harm done.
The Hermit