O.P. definitions

o.p.

Original Poster
Found on http://www.noslang.com/dictionary/o/

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O.P.

O.P. is British slang for an observation post.
Found on http://www.probertencyclopaedia.com/browse/ZO.HTM

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o.p.

Out of print.
Found on http://www.trussel.com/books/glossary.htm

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