I believe this would be referring to Danny DeVito, who played taxi dispatcher Louis De Palma on the American television classic "Taxi" back in the late 70's, early 80's alongside Judd Hirsch, Marylu Henner, Tony Danza, Christopher Llyod, and Andy Kaufman. From Wikipedia:

Louie De Palma (Danny DeVito) - The dispatcher for the Sunshine Cab Company. He not only has no morals to speak of, he positively revels in his misdeeds. Nothing is beneath him, from taking advantage of a drunken friend of his sometime-girlfriend Zena Sherman (played by real-life wife Rhea Perlman) to gambling with a young boy to stealing from the company. He lives with his mother (DeVito's real mother, Julia, in two episodes). Under the amoral exterior beats a heart of pure lead. That said, he has (on very rare occasions) helped his workers, as in the episode in which an arrogant hairstylist (played by Ted Danson) gives Elaine a garish makeover just before a very important event and further humiliates her by stating he "didn't know how to do taxi drivers." It is Louie who bolsters her confidence to confront him. TV Guide ranked De Palma first on its list of the 50 greatest TV characters of all time.