Method of oral contraception, where the man pulls out and shoves it down the girls neck during ejaculation. 100% effective at preventing pregnancy.
I don't have any condoms but I practice Plan N, were safe.
by Dragikaze November 29, 2016
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Every girl has a back-up plan, a plan B, or even plan C when trying to get laid. Some girls have a longer list that go all the way to L-M-N-O-P (like mine).

The "L-M-N-O-P's" are your last resort. He doesn't care that your stumbling and slurring your speech. He doesn't care that you have been dancing with other guys all night. He doesn't care that you haven't shaved your legs. He is the guy that will take you as you are no matter what just to get a shot at you. They lower their standards for you because you are drunk, they will probably never have a shot at you again, or the times they had you they really liked the cookie. But you lower your standards because they aren't attractive, you haven't found anyone better, or the last time you guys hooked up he didn't lay it down. The LMNOP's are an option that you just don't take.

My advice, just go home.
aimee: i need a quickie tonight

ashlee: why dont you call johnny over?

aimee: he was super lame last time we hooked up

ashlee: oh so he's your plan B now?

aimee: nah, more like a Plan L-M-N-O-P. Ya know, i'm really tired..maybe I should just go home alone tonight
by Good Girlz Gone Bad September 10, 2011
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All the other plans failed, and you have to resort to any way possible to eliminate remaining Africans.
"Boys look, Plan M failed, we have to resort to Plan N."
by kid.9.6 April 16, 2020
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