Robber Council or Robber Synod noun

A council held at Ephesus in 449, afterwards repudiated, which reinstated Eutyches (from the violence of its proceedings)

robber crab noun

1. A large coconut-eating land crab of the Indian Ocean
2. A hermit crab

robber fly noun

Any fly of the Asilidae, large, bristly, insect-eating flies

daylight robbery

Glaring extortion

rob Peter to pay Paul

1. To deprive one person in order to satisfy another
2. To raise a loan to pay off a debt