I can't drive a stick
In America, it isn’t necessary to know how to drive a stick (stick shift) in order to get a driver’s license, and as a result many Americans never learn.
This might seem silly to mention, but the line before it mentions his lack of a Lotus (British car), and the whole point of the song is about not bragging about shit you pretend to have or pretend to do. He’s being honest and coming clean about his inability to drive stick.
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