The Expedition is the sexual act of placing two in the front and six in the rear. Normally accomplished by placing the index and middle finger of one hand in the vagina and the pinky finger of the same hand and the entire other hand in the anus of your partner (lube optional). A derivative of the minivan where 2 are in the front and only 5 in the rear.
"Dude, my girlfriend is so loose in the trunk now the Minivan doesn't cut it. Last night I went with The Expedition on her ass."
A person who pushes an employee to get a job done even though they are not said employee's boss or supervisor. They can be very annoying. Most good expeditors are women with a sexy stomach and cute toes. That can motivate most men.
Listen Pam, the job will be done when it's done! I don't care that you're the expeditor.