Jeffrey Ross Lifschultz (born September 13, 1965) is an American stand-up comedian, insult comic, actor & director.

As a stand-up comic, Ross has appeared on TV shows such as The Late Show with David Letterman, The Tonight Show with Jay Leno, Jimmy Kimmel Live, Late Night with Conan O'Brien, Last Call with Carson Daly, Last Comic Standing, ABC's The View, and HBO's Real Time with Bill Maher. In addition to his television credits, he's also a regular on The Opie and Anthony Show. He also performs regularly for American servicemen and women stationed worldwide, and in support of the Hurricane Katrina relief effort in Louisiana and Mississippi.

Ross is also the current New York Friars' Club "Roastmaster General", and was a roaster for the Comedy Central Roast of Pamela Anderson in 2005. He has also written for, performed in and/or produced several other celebrity roasts, such as those for Hugh Hefner, Rob Reiner, Jerry Stiller, Drew Carey, Emmitt Smith, Carson Daly, William Shatner,Mike Greenburg, Mike Golic and Flavor Flav. One of Ross' most famous put-downs came during a 1999 roast of Stiller, in which he said of Sandra Bernhard, "I wouldn't fuck her with Bea Arthur's dick." (During the Anderson roast, he amended the joke to "I wouldn't fuck Bea Arthur's dick with Andy Dick's pussy." He also said at the same roast, "How is it possible that Courtney Love looks worse than Kurt Cobain?") He was the roastmaster when Dana Jacobson said "Fuck Jesus."

Ross' directorial debut, "Patriot Act: A Jeffrey Ross Home Movie" recently received the best feature film award at the Montreal Comedy Festival. The documentary is about Ross' life changing experience entertaining U.S. troops stationed around Iraq. It features fellow comedians/comic actors Drew Carey, Blake Clark and Kathy Kinney.

In addition to Ross' recent dramatic turn on CBS's CSI, he has appeared on HBO's Six Feet Under and Showtime's Weeds. In film, he has appeared in Stuck on You and The Aristocrats. He also provided the voice for the beagle Buddy in the MTV2 Sic'emation animated satire program that he created, Where My Dogs At?

Despite being a shlub from Jersey, Jeffrey Ross has accomplished a lot in his life. He's done everything from roasting almost dead guys at the Friars Club -- to playing a dead guy on the smash hit TV show, "CSI." As a stand-up comic, Jeff has appeared on dozens of TV shows including "Late Show with David Letterman," "Jimmy Kimmel Live," "The Tonight Show with Jay Leno," ABC's "The View," HBO's "Real Time with Bill Maher," Bravo's "Celebrity Poker Showdown," IFC's "Dinner for Five," Animal Planet's "Pet Star" and "The Jerry Lewis Telethon." He recently directed his first film, "Patriot Act" which chronicles his week long trip entertaining U.S. soldiers stationed around Iraq's Sunni Triangle. The film has appeared at numerous festivals and won an honorable mention during the Hampton's International Film Festival's prestigious "Films of Conflict and Resolution" program. His blistering performances at celebrity roasts for the likes of Hugh Hefner, Donald Trump, Jerry Stiller, Drew Carey, Shaquille O'Neal, Yankee's Manager, Joe Torre, Kelsey Grammer and Rob Reiner inspired New York Magazine to crown him "The Meanest Man in Comedy." Besides being a former board member of the Friars Club, Jeff has produced numerous celebrity roasts for Comedy Central and executive produced and hosted the highly rated and hilarious re-imagination of the roasts, "MTV's Bash of Carson Daly" which featured stars like Madonna, Eminem, Britney Spears, P. Diddy, Justin Timberlake, Jimmy Kimmel, Sarah Silverman, Andy Dick, Kid Rock and Nelly "bashing" the guest of honor for charity. In addition to Jeff's recent dramatic turn on "CSI," he has appeared on HBO's "Six Feet Under" and in the films, "Stuck on You," "Along Came Polly," "National Security" and "The Aristocrats." Jeff has also written for some cool shows including the MTV Video Music Awards for hosts Jamie Foxx and Chris Rock and The Oscars for host, Billy Crystal. He's also helped write the first season of "The Man Show" on Comedy Central and punches up movies for big shots like The Farrelley Brothers and Jeffrey Katzenberg.