A STIFF ONE

A cop saw a car weaving all over the road and pulled it over.  He walked up to the car and saw a nice-looking blonde woman behind the wheel.  There was a strong smell of liquor on her breath.  He said,  "I'm going to give you a breathalyzer test to determine if you are under the influence of alcohol."

She blew up the balloon and he walked it back to the police car. After a couple of minutes, he returned to her car and said,  "It looks like you've had a couple of stiff ones."

She replied,  "You mean it shows that, too?"