What is "the jig is up"

phr. (context US idiomatic English) An expression used to mean "We have been caught out and have no defense", or if spoken to a person who's just been found out as the perpetrator of an offense, it means "You've been discovered."

The jig is up may refer to:

• The Jig Is Up, a 2004 album by American fiddle player Peter Stampfel
• "The Jig Is Up", a 1993 song by Jim Witter from his self-titled album
• "The Jig Is Up", a 1995 song by Jill Sobule from her self-titled album
• "The Jig Is Up", a 2008 song by Edison Glass, from their album Time Is Fiction
• "The Jig Is Up", a 2010 song by Quasi, from their album American Gong