Actually, there is another definition:
In Australian and New Zealand slang, a “stickybeak” refers to two related concepts:
An Overly Inquisitive Person: It describes someone who is excessively curious or nosy, often poking their metaphorical “beak” into matters that don’t directly concern them. Imagine a nosey parker who can’t resist prying into other people’s business1.
An Act of Looking or Watching: When someone takes a peek or observes something, especially if it’s not directly relevant to them, they’re having a “stickybeak.” For instance, you might say, “Shall we take a stickybeak at that shop?” or "Have a stickybeak at this floor plan!"1.