Seg-Rash Share definition Flag the wounds, scratches, etc, you get after crashing on a Segway human transporter. 15 minutes after jumping on my friends Segway I crashed and ended up with a nice SEG-RASH on my shoulder. Seg-Rash by Bart 69 August 5, 2008 0 0 Get merch Get the Seg-Rash mug. Buy Now — $32.95 See more merch