Definitions for "Gremlin"
(RAF slang) Mischievous sprite imagined to frequent aircraft and to cause mishaps [ OED].
(folklore) fairies that are somewhat mischievous
a fictional mischievous creature
Keywords:  mogwai, bad, turned
a mogwai that has turned bad
Keywords:  grid, storage
an invisible control character created when the client intended to use the shift key but hit the control key instead