Nut
From Plastic Tub
nut n. 1. An encased morsel of reproductive potential. 2. That which exists in a rarefied state of vapor-free existence, clamp-proofed and impervious to poobs.
Extrapolation
"That Kook's a real nut. He toyed with the Red Coats like a cat. Everytime they thought they had him, he just seemed to slip out of their grasp like an invisible mist." -- posted to the now defunct Kook-o-phile.com in December of 2004.
"Pig nuts, also known as mountain oysters, are best served on a lemony hollandaise sauce." -- Unknown Author (Mazzistow Carrington, ed.). The Dallas Dumpling. May, 1979.
"The AA'ers are one tough nut to crack." -- Field Agent Smedley Wissock. Internal Report 27a, 1967: The AA and Satelllite Organs, Threat Factors and Subversive Tendencies. October 4, 1968. FBI.