For inheritance tax (IHT) purposes, a gift that is not fully given away because the person making the gift (the donor) keeps back some benefit for himself. For example, if a donor gives his home to his adult children (who live elsewhere) and continues to live there rent free, this would be a GROB and caught by section 102 of the Finance Act 1986, which charges such gifts to IHT as though they remained in the donor's estate.