Bug

A problem with computer software or hardware that causes it to malfunction or crash.

a type of limited wild card in poker games: a bug always counts as an ace, unless giving it another value would enable it to complete a straight, a flush, or a straight flush

An error in a computer program or in a piece of electronics that causes it to malfunction.

A concealed microphone or listening device or other audiosurveillance device. [JP 1-02] 2. A mistake in a computer program. 3. To install means for audiosurveillance. [JP 1-02] 4. A semiautomatic telegraph key. 5. A mistake or malfunction.