I am an infection, how you gon' stop it?
All up in your blood stream, no antibiotic

from Keys – Nicki Minaj Diss (Itty Bitty Piggy) Lyrics on Rap Genius

Meaning

Keys uses this kind of imagery often, painting herself as someone who got in despite not being wanted, here as an infection, and otherwise, such as the title of her mixtape, as an infiltrator.

To help improve the meaning of these lyrics, visit “Nicki Minaj Diss (Itty Bitty Piggy)” by Keys Lyrics and leave a comment on the lyrics box