The term 'fields of wheat' refers to having sexual activity in the countryside, similar to dogging it has become a common pass time in rural British culture, most commonly used by the upper class gentry and ladies of the manor.
A Winter's Worth of Wheat is an antiquated barter system used in some communities that face a long and unprofitable Winter season. At its purest darkness would a family receive enough wheat to last them through the Winter - regardless of household size - in exchange for a newly born infant. The infant was typically fed to abominable supernatural creatures such as vampires or brought up to be a eunuch or slave. Typically, however, was the term used on a more general scale to refer to any sort of illegal business that gave a large commodity in exchange for something irreplaceable and therefore usually of great sentimental value.
"So did Jenneigh get her abortion yet?"
"No, she said she's gonna carry it full term for a Winter's Worth of Wheat. Really wants that $500 Sephora gift card."
A girl who is absolutely hot and delicious when viewed from her back, but when you catch a glimpse of her front the view is nothing but bland and disappointing.
“Man, I wish I had never caught up to that girl on the subway. Nicest ass I’ve ever seen, but damn she had the face of a dog! Just another mini wheat!”