"Plainer necked" is a term used for all livestock, whether breeding or market animals. It's generally not what you want to hear. When an animal is described as plainer necked, it usually means they have a shorter, thicker, coarser neck.

Being plainer necked is seen as a negative, but it's all about looks. It doesn't affect how the animal functions or its overall health. So, while a plainer neck might not win any beauty contests, it doesn't mean the animal isn't just as capable in other aspects.
Questions that use this term.
Who is the boldest-sprung and deepest-ribbed, but also shorter and plainer-necked?
Species Distribution of Term
Distribution of the types of classes in our database this term is used in.