“You know how to whistle, don't you, Steve? You just put your lips together and blow.”

Surface meaning

Marie “Slim” Browning tells Steve that he can get her attention simply by whistling. The instruction is literal, but its purpose is clear: if he wants her, he knows how to call her.

Cinematic context

The line comes during Slim’s first encounter with the man played by Humphrey Bogart in To Have and Have Not. Their exchange is already charged with flirtation, and Slim uses the moment to turn a casual signal into an invitation. She is not asking for a declaration or arranging a formal meeting. She leaves him with an easy way to show that he wants to see her again.

Deeper meaning

The line gives Slim control of the scene. She presents herself as available, but only on terms she sets, with the confident assumption that Steve will understand the offer. The wording is playful because it reduces desire to a physical instruction, yet the directness makes it more intimate than a conventional romantic confession.

Lauren Bacall’s character does not wait passively for the man to make the first move. She names the desire, sets the rules, and walks away with the upper hand. The scene’s attraction comes partly from that reversal. The line sounds like casual advice, but it carries the force of a dare.

Pop-culture legacy

Ranked 34th on the American Film Institute’s list of the 100 greatest movie quotes, the line became closely associated with Bacall’s screen persona. It is remembered as one of the clearest examples of a film allowing a woman to express sexual interest without softening it into coyness. The wording has also made the line easy to imitate, since the simple action it describes turns the flirtation into a recognizable gesture.

Delivery

Bacall delivers the sentence in a low, assured voice, with the pause before the final instruction doing much of the work. The first part sounds like a practical question. The explanation that follows makes it unmistakably suggestive. Her calmness keeps the moment from becoming pleading, while the direct address gives the line the feeling of a private challenge.

Trivia

The role marked Lauren Bacall’s film debut. That fact adds another layer to the scene’s place in film history: one of her first major moments on screen immediately established the controlled, self-possessed presence that audiences would associate with her.