Context

This line is spoken by Slim, played by Lauren Bacall, in the film To Have and Have Not, directed by Howard Hawks (1944).

Daaaaang.

After sharing their first—and second—kiss, Slim (Lauren Bacall) tells Harry (Humphrey Bogart) that he doesn't need to anything else to get her attention. "Except maybe whistle." 

That's when she puts on the sultriest, huskiest voice imaginable and delivers the line. 

Bogey's cigarette isn't the only thing smokin' in this scene.

Where you've heard it

This is an iconic line in an iconic performance that launched an iconic romance between two Hollywood icons. It's also known as the double entendre to end all double entendres back when filmmakers had to be clever to sneak things by the censors.

If you somehow never heard it in the movie, you probably finally heard it when Lauren Bacall died on August 12, 2014. RIP, you goddess.

Britney Spears even crooned it on the track "Breathe on Me" from her 2003 album In the Zone...although anything Britney moans totally becomes a single entendre.

Pretentious Factor

If you were to drop this quote at a dinner party, would you get an in-unison "awww" or would everyone roll their eyes and never invite you back? Here it is, on a scale of 1-10.

Pretentious? Hardly. But just be careful who you say it to.