Top definition
Pouring milk in your cup before the coffee. Similar to "pouring the milk first" when preparing cereal.
He's a milk in first sort of person -- I wouldn't trust him.
by Absquatch September 14, 2015
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2
when you ejaculate into her vagina and proceed to still have sex with her

Milk in first
he masturbated into her vagina a proceeded to have sex with the sticky cave

.Definition-when a man masturbates and ejaculates into a woman's vagina and proceeds to have intercourse with said woman
milk in first
by XxmilkmanxX May 16, 2019
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