Definition

The leader might now consider to go to another parada by moving his right foot back. When the follower then steps with her right leg over the leader's left leg and pulls (in the next step) with her left foot the leader's left foot towards her right foot, she does a reverse mordida (try it out...).

(from cyber-tango.com (http://www.cyber-tango.com/art/t_term1.html))