What is big boobs girlfriend?

It seems like you might be referring to a common internet meme or stereotype. Typically, terms like "big boobs girlfriend" are used in a humorous or exaggerated way to describe relationships or physical attributes in memes or social media. It's often meant to be playful, though it's important to remain respectful and considerate, keeping in mind the individuality and dignity of all people regardless of physical appearance.

If you're referring to something specific like a media reference, character, or another context, please provide more details, and I'll be glad to help clarify further within that context. Always remember to engage with content and people in ways that are respectful and positive.