Top definition
What you call the little sister, who is way too cute to be human.
Texting the sister bunny:

Big sissy: "Hey sister bunny! I'm off from school. I'm coming to pick you up now. Want to go shopping??? LOVE YA!!!!!"

Sister Bunny: It's all good; I'll just get mom to pick me up.
by Smiley Bunny July 17, 2011
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