glitch

Short definition from Wiktionary

Noun

1. 1
   A problem affecting function.
2. 2
   An unexpected behavior in an electrical signal, especially if the signal spontaneously returns to expected behavior after a period of time.
3. 3
   A bug or an exploit.
4. 4
   A genre of experimental electronic music since the 1990s, characterized by a deliberate use of sonic artifacts that would normally be viewed as unwanted noise.
5. 5
   A sudden increase in the rotational frequency of a pulsar.

Verb

1. 1
   To experience an unexpected, typically intermittent malfunction.
2. 2
   To perform an exploit or recreate a bug while playing a video game.