A person who seems happy most of the time. She is very creative and her laugh is stunning.
Dude 1: Ohh god i love her laugh!!!
Dude 2: Yeah me to! Who is that?
Dude 3: It’s Rosalyn
by Uilkyhhhj July 10, 2018
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the most awesome wonderful girlie in tha universe....... yes she is for real
Dude, that is so Rosalyn!!!!! I wish I could be like that!
by bobolina May 22, 2005
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A rosalyn is a beautiful girl with short thick black hair and tan skin and brown eyes
by Raced car April 9, 2017
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The most cool, beautiful, funny, chill and awesome person you'll ever meet. Despite having social anxiety, the avarge rosalyn has plenty of friends, and has no trouble getting bitches.
Person 1: hi,I'm Rosalyn
Person 2:*cumming aggressively*
by Dawn_Has_Smol_Bren February 27, 2022
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A Rosalyn is a teenager in high school, and, more importantly, a babysitter.

These girls can handle almost any type of child, provided that they get paid some extra, extra, moolah on the side. Children are often intimidated or scared of her because she is just as cunning as they are.

First seen in Calvin and Hobbes.
If you ever need a babysitter for your cute, yet manipulative kids, the only one who will agree to do it is that girl across the street. She is clearly a Rosalyn.
by Cagefight December 6, 2006
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Roz for short. Literally the gayest person you'll ever meet bruh.
"Rosalyn is violently gay bro"
by gayeater January 16, 2023
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