I always thought of it as him saying he’s a vehicle for her love – doesn’t he say later in the song, “I’ll take you anywhere you wanna go”? “Jeepster” fits the meter better than “vehicle”, so maybe that’s why he used it.
And, @simone54 – seriously. How rude. There ARE T-Rex fans and if you don’t have anything constructive to add to a question, move ON. Seriously.
Nothing wrong with a T-Rex fan. T-Rex occuppies a spot in the development of Rock just like any other. “Bang A Gong” seems to go on and on so they must have hit on something.
Once you leave Mahler, Beethoven, etc. to talk about Rock and Pop you can’t get too philospophical about the quality of the group you are talking about. You’ve already left the truely substantial or “lofty” creaters of music. Rock is about rebellion and expression. Not the “genius” of the particular songwriter.