Why Was Margaret Houlihan Called ‘Hot Lips’ on ‘MAS*H’?

Lauren Novak September 14, 8:00 am

MASH, Loretta Swit, 1972-83 — 20th Century Fox Film Corp./Everett Collection

20th Century Fox Film Corp./Everett Collection

When M*A*S*H premiered on CBS on September 17, 1972, viewers met Major Margaret Houlihan, the no-nonsense head nurse played by Loretta Swit. They also quickly learned that just about everyone knew her by a much more memorable nickname: “Hot Lips.”

But if you only watched the TV series, you may have wondered where that name came from. The show never really explains it. To get the full story, you have to go back to the 1970 M*A*S*H movie, and technically even further to the novel that started it all.

“Hot Lips” came before the TV series

Margaret first appeared in Richard Hooker’s 1968 novel MASH: A Novel About Three Army Doctors, which later inspired the movie and television show. In the book, Margaret and Major Frank Burns become intimate while siding against Hawkeye, Trapper John, and Duke Forrest (not in the TV show, but played by Tom Skerritt in the film), whose behavior they consider anything but military. Trapper John gives her the nickname behind her back to mock her rigid, “by-the-book” military attitude and her affair with Burns. However, the 1970 movie gave the nickname and the origin story most fans probably best remember.

Sally Kellerman played Margaret in Robert Altman‘s film, while Robert Duvall took on the role of Frank Burns. During a private encounter in Margaret’s tent, the pair don’t realize a microphone has been hidden nearby, and their conversation is broadcast over the camp’s PA system. At one point, Margaret tells Frank, “Oh, Frank, my lips are hot! Kiss my hot lips!” After that, the name stuck.

The TV show never really explains the nickname

20th Century Fox Film Corp./Everett Collection

When Loretta Swit took over the role for the television version two years later, “Hot Lips” came with the character. In the first episode, she was called by her nickname without explanation.

The pilot even makes things a little confusing. Hawkeye calls her “Hot Lips” early in the episode, but later, General Hammond arrives and enthusiastically greets Margaret by the same name. Hawkeye and Trapper then repeat “Hot Lips?” as if the nickname is new information.

Loretta Swit didn’t want Margaret to known just as “Hot Lips”

As M*A*S*H continued, Swit became increasingly interested in showing that Margaret was much more than her nickname. She has previously said that she never planned to play Margaret the way “Hot Lips” might imply. Instead, she saw her as a skilled head nurse and career Army officer who deserved to be taken seriously.

That eventually showed up in the series. Swit recalled that by around the third season, scripts were referring to the character simply as Margaret rather than “Hot Lips.” Over the years, Margaret also became far more independent, particularly as her relationship with Frank Burns ended and the show gave her storylines beyond being his romantic partner.

Swit later pushed the writers to continue developing Margaret, something she remained proud of long after the series ended. The nickname never completely disappeared from M*A*S*H, but the character was given more personal development thanks to Swit.