n.矿渣,熔渣
vt.& vi.(使)成渣(状),变熔渣
He's always slagging his brother off.
他老损他的弟弟.
People have been slagging me off.
人们一直在贬损我。
Mark's always slagging off his friends behind their backs.
马克老是在背后诋毁他的朋友.