The world is your lobster.

Often used as a playful twist on the better-known saying about the world being "your oyster," implying that opportunities are available if you know how to take advantage of them. The name provided refers to a fictional character associated with wheeling-and-dealing bravado, which fits the tone of the line.

A humorous, slightly cheeky way of saying you can go after what you want and make the most of the situation, especially through confidence and hustle.