1. A rule that permits a party to take back evidentiary materials that were mistakenly turned over to the other party, but to which the other party would not have been entitled.
2. money that a party is entitled to keep under one tax provision, but which is taken from them by another tax provision.
3. any recovery of a performance-related payment based on discovery that the performance was not genuine.

1. flattering; sycophantic.
2. A flatterer or sycophant.
3. to flatter.

1. . literally, one who claws the back; hence, one who fawns on another; a sycophant; a wheedler.
2. same as back-scratcher, 1.
3. flattering.
4. to fawn on; curry favor with.

1. finding a way to take money back from people that they were given in another way