A bro truck is basically any truck (SUV's included) with a ridiculously large lift kit and oversized rims. Ridiculously large being a lift that raises the truck so high that it renders the vehicle dangerous to actually offroad. Rear and side windows are plastered with common bro stickers (SRH, Skin, SoCal, KMK, Famous Stars and Straps, Skin) and so forth... These vehicles basically serve as dirt bike transporters and pavement queens. Bro trucks have no real offroad qualities and are laughed at by people who actually offroad their trucks that have legit lifts.
Dude...Five threw a 20" lift on a half ton Silverado. Thats such a bro truck.