When someone named "Tim" shits their pants before they have a chance to make it to the toilet. Ideally, the incident would occur after eating McDonald's, Taco Bell, or any kind of knockoff brand junk food, however these conditions are not required for the incident to officially be classified as a timcident.
Bro 1: Yo, is that Tim running across the quad? Why is he waddling?
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.