In modern slang and casual contexts, the term "unicorn" can have various meanings beyond the more specific associations with polyamory or being a third in a relationship. It's important to remember that slang can be context-dependent and may vary among different social circles. Here are some other possible interpretations of why your friend called you a "unicorn":
Unique or Special: In a general sense, "unicorn" can be used to describe something or someone as unique, special, or rare. If your friend called you a unicorn, it might be their way of expressing that they consider you to be one-of-a-kind or extraordinary in some aspect.
Exceptional Qualities: The term "unicorn" is sometimes used to compliment someone for possessing exceptional qualities or skills that stand out from others. If your friend used it in this way, they might be praising your talents, abilities, or personality traits.
Whimsical or Fun: Unicorns are often associated with whimsy and fantasy. If your friend called you a unicorn, they might be referring to your playful or fun-loving nature, or they might be teasing you affectionately in a lighthearted manner.
Positive Traits: Unicorns are often depicted as beautiful, graceful, and gentle creatures. Calling someone a unicorn could be a way of highlighting their positive and kind-hearted nature.
Slang Evolution: Slang terms can evolve and take on new meanings over time. It's possible that within your friend group or social circle, the term "unicorn" has acquired a unique and different connotation from the widely known associations.
To fully understand why your friend used this term to describe you, the best approach is to ask them directly for clarification. It's possible that they have a particular inside joke or a personal meaning attached to the term in your friendship. Open communication is essential in such situations to avoid misunderstandings and to gain a clear understanding of your friend's intentions behind using that term.