A female with many physical flaws that makes her undesirable to most or almost all, but very desirable to her admirer, based solely on her personality, loyalty, and/or sexual attributes.
Friend: Dude, why did you agree to date that girl? She has no teeth, she's overweight, and has body odor.
Me: Yeah but she can make my toes curl when she gets me off, she's my Chan Chu Toad.