Pinky Butt Share definition Flag The act of inserting the digitus minimus into ones own or another's anus. The degree of which depends on the length of said "pinky". "You look a little tense. You could use a little pinky butt" Pinky Butt by DeEBs15 August 26, 2011 0 0 Get merch Get the Pinky Butt mug. Buy Now — $32.95 See more merch