hands-down winner

Humorous term for a gal who is an "easy shoo-in" victor over a lustful-for-boobs dude who is trying to lift said chick's shirt off over her head; da gal's super-effective top-removal-thwarting strategy is to simply keep her arms lowered instead of obligingly raising them up over her head.

Even if a lady is a hands-down winner at keeping you from getting her naked from the waist up, you can still access her chest-pillows by either raising her shirt just as high as her arm-pits, or simply reaching up underneath the hem of her shirt and cupping her boobs from there.