Great day for the Glimmer Twins

The sun is shining and The Rolling Stones are blaring from my car speakers as I drive around today.
Listening to these timeless rock classics got me thinking about "The Glimmer Twins," the nickname often given to Mick Jagger and Keith Richards.
Where did the term come from?
According to legend, Jagger and Richards took a cruise to Brazil in 1969. During meals, the rockers and their girlfriends shared a table with an older couple who kept inquiring as to the identity of the famous pair.
"Just give us a glimmer!" the oldsters would say, begging for a hint to Jagger and Richards' true identities.
The rockers loved the term so much, the legend states, they began using it as a production credit in the 1970s.