Lamanite Sacrificial Idols are the idols to whom Lamanite forces “did offer them up as sacrifices unto their idol gods” after taking prisoners from the city Teancum (Mormon 4:14).
When Lamanite forces returned and Nephites were “driven and slaughtered with an exceedingly great slaughter,” their women and children “were again sacrificed unto idols” (Mormon 4:21).