a vagina with highly evolved muscles that enable it to create a vacuum suction sensation, similar to the retractable, secondary mouth of the creature seen in "Alien." Often gives the feeling of receiving oral sex.
Rick: Bro, my dick hurts from last night.
Stu: Why? Did that black chick have a coco mandango?!
Rick: Yeah, nearly slurped my wang off.
Stu: Coco mandango...gets you every time.