Rowdy
Your mouth is showy so it makes everybody around you rowdy.
Your mouth is showy because it's covered in grills and bright red lipstick. People get rowdy because you're a celebrity and your showy mouth is your signature look, and everyone's so excited to see your mouth in person.
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Everyone is getting rowdy so you get in your car (か) to escape.
As you drive away in your car you flash that signature mouth at them one more time, and you can see them getting even more rowdy.