Lunge is a technique that the EITC, Navy and Skeletons use. The move is a thrusting move with their cutlass towards the pirates. Currently, this move is only available to the enemies. It is somewhat similar to the sabre move Rapid Strike.
In Fencing, a lunge is a strong attack caused by the attacker take a long step forward while thrusting with their weapon - normally aimed at the center mass of their target.