An electric bell was therefore rigged up in the gun-pit, with a bell-push in the o.p.
Interim list of subject headings for New Zealand school libraries, o.p.
Killed by a bomb dropped in daylight by one of our own aeroplanes as he was going to the o.p.
Just before daybreak our telephone line went west and we could not get through to our o.p.
She lifted her voice and called, "o.p., is that water warm?"
We were shelling a small mosque, which he was using as an o.p.
And was o.p. working the ketch back to give me a chance of rejoining her?
Re-enter the dean (o.p., as our stage directions would have had it), with—a pair of stays!
[fr operator or operative]
Other people's: OP. Other people's money
[1901+; perhaps a translation of Yiddish yenems]