MilkBrush Share definition Flag When a man cums on a girls chest, then uses his penis to paint a picture on her tits. Thus creating a brush, using "milk" as paint. "Yo bro, i fucking gave that kyfe a Milkbrush last night" MilkBrush by MilkBrush January 26, 2015 0 0 Get merch Get the MilkBrush mug. Buy Now — $32.95 See more merch