Kill the spider

The first time your wife lets you hit it after she's been withholding sex for so long you could swear there's cobwebs in her birth canal. Just like killing a real spider, desperation rules, and the only option is to get the job done as quickly as possible.

Actual white spiders have bacteria that decays the flesh and have a white tip on their arse. So it means both to push a heap of cum out of your pussy in an attempt to avoid an STD and watch it slide down the toilet bowl. Or to simply spray a heap out of cum out of your arse (again to avoid an STD) so that is spreads in the toilet and trickles down the sides like spider legs.

Euphemism for defecating