A variation on 'grom' or 'grommet.' A nickname for a young, talented, action sports athlete. Grommie usually applies only to riders under age 15 years. Most often used in skateboarding, snowboarding, and surfing, but is quickly gaining popularity in motocross, wakeboarding, and freestyle bmx.
Did you see that grommie hit the 100' step-up? So sick.
grommie is someone smaller than everybody not handy capped just small
pick that crap up grommie