hello motherfucker Share definition Flag 1.A greeting usually to someone who stood you up, And never texted you back Lenny stood me up and didn't show up, so i greeted him with the good ol' "hello motherfucker" hello motherfucker by thattrolltho January 24, 2015 0 0 Get merch Get the hello motherfucker mug. Buy Now — $32.95 See more merch