look up any word, like dirty sanchez:
 
1.
The device in a Television Show or Movie which keeps the plot rolling, generally a character or situation.
The MacGuffin of 24's third season was the threat of a nuclear holocaust.
by SoylentGreg July 17, 2005
 
2.
An object of high value that everyone wants. Originally the term "MacGuffin" with the same meaning, used in literary plots.
Random person: "I love your car!"
Me: "I know, isn't it just a maguffin?"
by Leb January 31, 2004