To declare yourself a "Milk Bro" with another buddy, the act of intercourse must take place with a female on the same or separate evening with the lack of a contraceptive. Note: Filling her tank is a crucial step in deeming yourself Milk Bros.
You slept with _____ ?? So did I bro ! Did you wear a dome? Nawh me neither ! So you filled her tank? ..... High five milk bro ! We're Milk Bros !
by Darko83 June 12, 2013

by Hdhshdhshsbz June 15, 2021

Someone who wasn't breast fed when they were young. They drank powdered milk that was bought from a shop.
by 349857309468723908719857193845 June 11, 2019

by MetroGamezHD June 7, 2018

by SHADOWMILKCOOKIE February 11, 2025
