BACKBITE is validvalid

to slander [v BACKBIT, BACKBITES, BACKBITING, BACKBITTEN, BACKBITTEN] : BACKBITER [n], BACKBITING [n]

58,877 of 196,601 in NWL2023·also valid in CSW24

to speak ill of [v BACKBIT, BACKBITTEN, BACKBITING, BACKBITES]