The phrase "what's cooking good lookin" is a classic, vintage icebreaker and flirtatious greeting that combines a casual inquiry about what someone is doing with an upfront compliment on their physical attractiveness. Originating from mid-century American pop culture and old radio shows, it uses the word "cooking" metaphorically to ask what activities, plans, or projects the person is currently working on, wrapped inside a playful, charming line designed to start a lighthearted conversation.