I lost track of when I first heard about this (probably in Vito Russo's book?), but even the film's Wiki page includes this section: Unscripted ad-lib by Grant It is debated by some whether Bringing Up Baby is the first fictional work (apart from pornography) to use the word "gay" in a homosexual context. In one scene, Cary Grant's character is wearing a woman's marabou-trimmed négligée; when asked why, he replies exasperatedly "Because I just went gay all of a sudden!" (leaping into the air at the word "gay"). As the term "gay" did not become familiar to the general public until the Stonewall riots in 1969, it is debated whether the word was used here in its original sense (meaning "happy") or is an intentional, joking reference to homosexuality. In the film, the line was an ad-lib by Grant and not in any version of the original script. According to Vito Russo in The Celluloid Closet (1981, revised 1987), the script originally had Grant's character say "I...I suppose you think it's odd, my wearing this. I realize it looks odd...I don't usually...I mean, I don't own one of these". Russo suggests that this indicates that people in Hollywood (at least in Grant's circles) were familiar with the slang connotations of the word; however, neither Grant nor anyone involved in the film suggested this.