A video that isn't okay to watch while eating lunch. Isn't limited to but normally involves insects, feces, vomit, or the mixture of all three.
Guy1: Dude, check out this video titled insects vomit feces in bear corpse eye
Guy1: Oh god! Blaaaaarrgghhh uhh... Blarg! (<--Vomit)
Guy2: That video should have had a NSWL tag.