What is "tushy"

Usage examples of "tushy".

Hittner became very interested when he talked about tushies or pee-pee, so he gave the doctor plenty to be interested about, finding such things in every inkblot picture.

Shit, I bet you don't even have any tushy hairs—" And when both of his hands shot down to pull off her flowered panties, her voice broke free and blasted out as screeches.

What in thunder did he tangle with back there, a tushy old sow with a litter she was guarding amid them peppers?