Grease, Another Star in the Career of the Bee Gees

Barry Gibb recounts that one day, the Bee Gees' manager, Robert Stigwood, called him.
He was producing the film version of the musical “Grease” and needed a new title song. Barry hadn't seen the film; this was a creative challenge.
“How on earth do you write a song called ‘Grease’?” he wondered.
“I remember walking along the pier, when it suddenly occurred to me that it was a word, and the thing to do was to write about the word.”
Grease is the word, he wrote, is the word that you heard. It’s got a groove, it’s got a meaning.