When two people of two different races (typically African American and Caucasian) have a baby togther. Also known as bi- or multiracial children.
Person1: That little girl is so beautiful! What's her ethnicity?

Person 2: She's a swirl baby. They're are always gorgeous. She's mixed with Spaniard, African American, and Caucasian.
by sammiecakkes January 8, 2015
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A chick, not necessarily sexy, that has ethnic roots of both Caucasian and African decent, resulting in a light brown skin tone. (Swirl derives from the twist of vanilla and chocolate in an ice cream cone).
Ex. 1
Person 1: Dude, I don't go for black chicks.

Person 2: She's not fully black bro, she's a swirl baby so that shit's legit.

Ex. 2
Person 1: Swirl babies are sexy, they got the booty of a black chick without the darkness.

Person 2: Hell yeah bro...
by Tilanda88 September 5, 2011
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