Disambiguation: this should not be confused with "the" Verkerer seen in earlier sources.
To turn the blade from one side to the other over the opponent's blade to prevent them from continuing around with cutting around or other works. For example from a bind from the left, turn the pommel under the right arm and turn the hands so you fall over his blade. When used this way it is similar to a krumphauw performed in the bind.
See Anbinden Application - Verkehren