LORELAI: Hey, is Jackson in the house? Let me hear you say “unh”.
“Jerome is in the house” is a catchphrase from the sitcom Martin (1992-1997), starring comedian Martin Lawrence in the title role as a free-spirited radio DJ in Detroit, and also as a host of supporting characters, including his own mother Edna, an annoying neighbourhood child named Roscoe, and a stereotypical white surfer-redneck named Bob (performed in whiteface with a blond wig).
Jerome was another of Lawrence’s characters, a loudmouth, once-flashy, now aging pimp who runs an illegal casino and sports a gold tooth. His signature spiel and personal theme song was, “Ooh, I say, Jerome is in the house … I say, watch your mouth!”. The catchphrase “in the house” quickly became highly popular.
Martin won numerous awards and was one of the highest-rated shows on the Fox Network at the time. It went into syndication, and is still on cable television and streaming services.