noun. Firm. Strong. Dare I say "buns of steel"?
Real citation: "On my last post Kathie commented on the non-squooshy-ness of my butt as I commented on her blog on it's squooshy-ness. (And then she squooshied and I squooshied and she knew I squooshied and I knew she knew I squooshied.)"
(Jan. 20, 2006, The Absent Minded Housewife, http://www.absentmindedhousewife.com/2006/01/omg-becky-look-at-her-butt.html)
Made-up citation: "I admire the non-squooshy-ness of your body. Yet I fear the giant spears of your henchgoons. What a pickle."