Epitrope
Epitrope , noun
[Latin, from Greek {not transcribed} reference, arbitration, from {not transcribed} to turn over, to give up, yield; 'epi` upon, over + {not transcribed} to turn.]
(Rhetoric) A figure by which permission is either seriously or ironically granted to some one, to do what he proposes to do; e. g., “He that is unjust, let him be unjust still.”