The 15 upvoters who preceded me seem to have firmly grasped this definition. For the rest of us:

Bimbofication is a practice, kink, or fetish that involves role-playing and transforming oneself into a stereotypical portrayal of a “bimbo,” characterized by exaggerated femininity, playful behavior, and a carefree attitude. It emphasizes empowerment and self-expression, allowing individuals to embrace their sexuality and challenge societal norms.

Also the bleached hair, excessive makeup, lip injections, and comically large breast and butt implants.