e/Golden rivet

Information
has gloss	eng: In naval folklore there is a tale that every ship is built containing a single, commemorative "golden rivet"— an idea doubtless adapted from the golden spike that was temporarily driven at the completion of the transcontinental railroad in 1869. The rivet's location is allegedly different for each ship and undisclosed, known only to the crew. Of course no such thing exists: gold is too malleable to use for a rivet. Like many urban legends, the "golden rivet" is perpetuated for the amusement of "old salts" at the expense of the gullible.
lexicalization	eng: golden rivet
instance of	c/Practical jokes