The sudden rush of aggravation and disorientation felt when becoming ensnared in a previously unnoticed spider web, often accompanied by random thrashing movements. The intensity of a spidergasm may be heightened if the subject is not fully awake or suffers from arachnophobia. A secondary effect may be felt up to an hour later if the spider responsible for the web is found in the subject's hair or clothing.
Chuck lapsed into an uncontrollable spidergasm as his face brushed against a web as he exited his house.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.
FRIEND A: "Did you just take a stealthie of me?"
FRIEND B (turning phone around): "no I was just using snapchat's new filter, see?"