Is the name for the couple of Barney and Robin of Howi I Met Your Mother, usually used in fandoms. The name comes from the combination of the words Swarley (The name Barney had for an episode) and Sparkles (The last name Robin used while she was a teen singer in Canada, Robin Sparkles)
If you know a Swarleen, you're lucky. She's always a really caring person and will be down to help you out with shit. She has a really dirty mind and if you say anything to her, she can make something dirty out of it. She loves listening to music, mostly rap
Person 1: Yo know Swarleen
Person 2: Yeah she's so caring but her mind dirty AF
Person 1: True if I say anything to her she's gonna make somethin dirty out of it no cap
Person 2: Even tho she has a dirty mind I love how she's always down to help people