This is a bicycle trick in which you use your arms and legs to jump and lift the bike off the ground to avoid an obstacle or hop onto a curb. Looks rad, +20 cool points for you.

To cause one's bicycle to become airborne by lifting the front wheel and then the rear wheel into the air with such timing that both wheels are simultaneously airborne for a period. Bunny hops are performed either to navigate course features, to perform tricks or to avoid obstacles, depending on the discipline of competition.