TrenchBaby Share definition Flag A young nigga, born in the trenches raised in the trenches. (usually has family ties to the streets) "i been in the hood since a shorty, im a TrenchBaby" TrenchBaby by PopOutGang January 17, 2019 0 0 Get merch Get the TrenchBaby mug. Buy Now — $32.95 See more merch