Nipples that taste quite good in your mouth, sometimes referring to milky tits or just a saying.
"Giiiirl, Kelly has such Sugar Nips, they just melt in your mouth. Somewhat like curdy does to your bunghole."
"Veronica told me that Michael has such hot Sugar Nips, they're so round and voluptuous."
"Mmmmmm I'd so fondle them with my Wimika crushers!!!"