"Proverbial Lemon" refers to anything that doesn't function properly. Commonly used for cars which have problems no one can fix, it can also refer to a flashlight, a radio, or anything mechanical.
Captain Picard: The Federation may be buying a "Proverbial Lemon". (Star Trek: The Next Generation episode "The Price")
by The Slang Overwatcher October 18, 2017
To kiss the Blarney Stone is said to bring about a charm on the kisser, to bestow upon them a silver tongue with which they get the gift of the gab to spin flattery, tales, and songs to mesmerize others.
A man attempting to kiss the Blarney Stone falls to his death. Holmes' investigation reveals this as a murder
by The Slang Overwatcher October 25, 2017