Without keywords it should generate a rather modest pic but if you want that bimbo look..
Use key keywords such as: large breasts, large butt, wide hips, narrow waist, thick lips, muscular, blonde hair, twintails, bimbo. For a bimbo look.
If you want a more drastic bimbo look add: "thepit" or "th3p1t". Use both if you want a really strong look.