0 to raise the top lip at one side in a kind of smile that expresses scorn -- pohrdavě se usmívat
What are you sneering for?
1 (with at) to show contempt for (something) by such an expression or by scornful words etc -- vysmívat se
2 to say with contempt -- říci pohrdlivě
3 a scornful expression, words etc that express contempt -- pošklebek, posměch