Tech Term:

Started when a moth was found between two relays inside a government(US) computer back when a computer occupied an entire room/storage center.

Flash back to the new century and a bug refers to a glitch which causes a computer program or hardware to malfunction, resulting in unwanted actions. These actions can range from a program failing also refered to as BSoD, or a CTD. If hardware is affected, the results can mean lower performance, or inability to boot.

A bug can be remedied in a number of ways, an update from the hardware manufacturer, an update from the software vendor, or help from a tech savvy community. The latter of the three usually doesn't include a permanent fix, but a loop around the problem resulting in desired performance without the intervention of the manufacturers.

A fault in a computer system or any physical entity including humanoids.

commonly refered to as "the bug"

1.
An STD.
Can be used to describe a large variety of sexually transmitted deseases but this term is most well known for meaning THE BIG ONE... HIV or AIDS.

Bug
(to pester)

A way to call a VolksWagen Beetle.

(n.) A miniature electronic device that records sounds and transmits the playback to a remote receiver. Usually placed in internal settings, it's installed with regard toward optimal concealment and acoustic clarity. (There have been many new modifications to the genre of "bugs" from environment adaptability to signal transmission type. Due to the 4th Amendment, all forms of U.S. law enforcement require court permission along with strict rules in the use of these devices.)

Back Up Gun. (Noun)

A secondary gun that is carried, in case the primary gun is inaccessible or out of ammo.

a thing that crawls around until it is stepped on or killed in any other way.