i'll let urban dictionary take this one...guess which one i'm referring. it's slang doll  
   1. pink taco
 labia minora of the female genitalia, which resembles the folded tortilla of a taco.
 i.e. I saw your sister's pink taco. 
 2. Bar at the Hard Rock Casino - Las Vegas
 i.e. Your sister and I met at the Pink Taco