often used in reference to those who urinate every few minues after they break the seal. not a reference to phallis size, simply a reference to bladder size.
Wow, you're going to pee again? You just went roughly 49 seconds ago. You've defintely got squirrel bladder.
When you squeeze out such a long turd that it curls like a squirrels tail and the nose cone of the ass missile kisses your backside before it can be pinched off.