Post Milky
Referring to any mammal that is past the breastfeeding phase of their lifespan. To be "Milky" would imply that one is currently suckling the milk.
Tom: "I got post milky when I was 2"
Jared: "Oh yeah? I was milky with your mom last night"
Tom: "Fuck you, Jared"
Jared: "Oh yeah? I was milky with your mom last night"
Tom: "Fuck you, Jared"