The opposite extreme is referred to as "rose petal."
It is important to note that while current fashion tends to favor labia near the rose petal end of the spectrum, there is nothing "gross" or "weird" about roast beef. Every vulva is a unique and special part of every women.
Other terms that describe the form of a women's labia include "innie" and "outie," both referring to whether or not the labia minora protrude from the labia majora.
Contrary to popular belief, roast beef is a prized treasure a girl is born with, much like big tits, rather than a grotesuqe result of overusage.