What does butterfly mean in slang

Indeed, sir, the term butterfly in slang can refer to a person who is easily flattered or impressed, often with a touch of vanity. It's a phrase that captures someone who may be a little flighty or fickle in their affections. In some contexts, it might also describe a man who is particularly attentive to his appearance or enjoys the company of women, quite the butterfly in the social sense. A rather charming and rather whimsical way to describe such a character.