nasty justin Share definition Flag When you tuck your weiner at a NA meeting. Pretending to be a woman and pick up male new comers in hopes of 13th stepping them. That was pretty lame that he pulled a nasty justin on the guy with 3 days clean from meth. nasty justin by Mike-nasty February 19, 2021 0 0 Get merch Get the nasty justin mug. Buy Now — $32.95 See more merch