A sock that comes half way up your calf. Usually worn by males, particularly lacrosse players.
Some call it a mid-calf. This is incorrect. They are called "calfies".
Where a male is on all fours, their romantic partner suckles on their penis as if they where a calf feeding from their mother. Mooing and groaning may increase the pleasure for all parties involved.
i can't wait to get home for a calfie tonight, it will be udderly amazing