A euphemism for an anus.
My girlfriend hates it when I try to squish the Spider Button.
if you imagine a round piece of soft flesh with the look of the eight legs of a spider all spread out from one central deep, dark brown point and ponder where we all love to plunge a finger now and then, you will know exactly what i am talking about. seepooper and balloon knot
The itsy bitsy spider climbed up the water spout.