What's a snowbunny?

A guy I work with told me he has a soft spot for snow bunnies after asking me to be his bae. He's 20 black and I'm 25 white and honestly all this terminology is confusingly. I figure the snowbunny thing is because I'm white but I can't tell what he's trying to say or if he's just messing around. Especially since I always thought bae just meant babe which can be used casually..
What's a snowbunny?
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