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Airborne military term for your ass. The five points of contact for landing after a parachute jump are (in order), 1. balls of feet, 2. heels of feet, 3. thighs, 4. ass, and 5. shoulder blades.

Term usually used to describe one who needs to pull their heads out of their ass.
"Ssg. Harston hasn't put my leave request in yet."
"Well, he better pull his head out of his fourth point of contact and get cracking on that!"
by TheGlorious1 January 01, 2010
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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