Green’s Dictionary of Slang

nuggie n.

[? nubbies n.]

(US) a woman’s breast.

[US]J. Lahr Hot to Trot 218: ‘Nibble my nuggie,’ Sally whispers.
V.C. Strasburger Rounding Third 40: Now, Amy, I’m going to reach up and grab your nuggies and play with them a while [HDAS].