critical size

when it's so big it can't help but get bigger, sucks itself to get bigger, never goes past large or x-large on the smaller side of scale

cock sucking, eating inside

inch worming

bucking up

normally he'd be getting eatin inside

while he gets bigger from being critical

but he bucks up

and since he's critical he doesn't need it, it won't go away

usually the boys that buck up get it