BTW, who's Lou? :)
Lou is the lazy, incompetent duputy in Fargo, or any lazy incompetent, especially a subordinate.
Police Chief Mary Gunderson arrives at the scene of the slaying of a State Trooper, after Lou, who was the first officer to arrive. http://www.filmsite.org/fargo2.html takes it from there:
According to her incompetent deputy, the last vehicle that the trooper cited was "a tan Ciera at 2:18 am. Under the plate number, he put DLR - I figure they stopped him or shot him before he could finish fillin' out the tag number...So I got the state lookin' for a Ciera with a tag startin' DLR. They don't got no match yet." Considerate of her partner's low aptitude and poor policework, she demonstrates her superior observational skills - along with a joke:Marge: I'm not sure that I agree with you a hundred percent on your policework there, Lou.
Lou: Yah?
Marge: Yah. I think that vehicle there probably had dealer plates. DLR?
Lou: Oh...Geez.
Marge: Say Lou. Did ya hear the one about the guy who couldn't afford personalized plates, so he went and changed his name to J3L 2404?
Lou: Yah, that's a good one.