Pooposition 

The serious conversation you bring up to your girlfriend/wife/fling about doing anal.

Debano " Listen. Babe. I got a Pooposition for you."

Beky" I'm listening."

Debano" If you allow us to experiment with back door penetration...I'll go shopping with you more..."

Beky" Alright! But we must use mass amounts of lube!"

Pooposition by Daravouchi December 3, 2013

propositioning 

If someone is propositioning you, it means that they are offering you sex. It is a more polite and euphemistic way of saying someone wants to bang you.

"Pete is propositioning me again!"

propositioning by fayestrawberry November 1, 2013

Nacogdoches Proposition

The act of receiving a blumpkin whilst delivering a Cleveland Steamer; in other words, getting a blowjob while taking a dump on a woman's chest.

Whilst dropping a Cleveland Steamer on his date's chest, Max was shocked when she started giving him a blumpkin - the Nacogdoches Proposition at last!

Nacogdoches Proposition by 4E4 August 31, 2011

Proposition 8 

Generally refers to California's Proposition 8 that was voted on in November 2008.

It banned same sex marriage in the state of California.

It passed with a 52:47 ratio, but was overturned in August 2010.

Proposition 8 was recently overturned by a judge.

Proposition 8 by Pikamander2 August 13, 2010

Prepositional-Proposition Theorem 

In the case where the prepositional phrase “in bed” is added to the end of a fortune cookie saying, the entire phrase will always makes sense and could potentially make you more appealing to your date.

In an attempt to captivate and entice Jill, Matt applied the Prepositional-Proposition Theorem to his fortune cookie saying and announced “Your talents will be recognized and you will be rewarded...in bed.” Unfortunately, his date Jill was not impressed.

Prepositional-Proposition Theorem by jayedee March 31, 2009

Proposition 

to request sexual favors in exchange for monetary or material compensation.

Jeanine the massage therapist was propositioned 5 times in the past week.

Proposition by ParaphiliaPro November 24, 2009

preposition 

A word you should never end a sentence with.

John: Where are you at?
Grammarian: NO! You can't end a sentence with a preposition!
John: Fine. Where are you at, asshole?

preposition by Denlah August 5, 2012