posted on Dec, 4 2010 @ 08:47 AM
It was always used as a joke when someone passed gas.
Much like blaming it on the dog but spiders aren't generally visible.
According to urban dictionary.com:
A rare species of spider classified as Flatus-Arachnid, more commonly known as The Barking Spider. Dating back to Prehistoric times it is the only
species of its kind to warn its prey by expelling air from its body, and releasing a nauseous odor. Extremely small it likes to hide in tight spaces
like the pockets on jeans, and interacts, and is associated with most living beings.
edit on 4-12-2010 by GrisGris because: (no reason