Named after the rabbit from Disney's Bambi, whose
father told him "If you don't have
anything nice to say, don't say anything at all." It is way of teaching of keeping derogatory comments to oneself in
respect to those who aren't as able as you are to avoid conflict.
Male 1:
Man, that a-
hole is such a-
Male 2: Hey, remember Thumper's Law
man.
Male 1: Fine, don't want any problems anyway.