Special Somepony
From Equestripedia, the Archives of Equestria!
Very Special Somepony, or just Special Somepony is a term among Ponies for a boyfriend or girlfriend, if not a spouse as well. At least one source indicates that variants may also exist among other species, such as "Special Somebreezie."[1]
Overview
During Hearts and Hooves Day, the Cutie Mark Crusaders attempted to find Miss Cheerilee a "Very Special Somepony" to spend her day with, eventually settling on Big McIntosh a their choice for her.[2]
Clear Sky referred to Quibble Pants as her 'special somepony', meaning the term isn't exclusively used by foals.[3]
Behind the scenes
"Special Somepony" is a play on the terms, "special someone" and "special somebody", lighthearted ways to announce affection for someone's significant other.