The term "friendly amendment" is used by some groups that do real live meetings. It applies to a proposal to amend a motion that has been moved and seconded, where typically the mover and seconder must approve the amendment. Presumably something that doesn't constitute a modification preserving the intent of the motion would be considered to be out of order. Usually this must be done during the discussion of the motion and before the question has been called to force a vote on the original motion.