verb
1.
to smile with attendant facial contortions expressing scorn or contempt
sneered haughtily at the beggar
Synonyms: fleer, leer, ||sleer; compare smirk
Related Word: grin, smile
Idioms: curl one's lip, make a scornful ( or mocking) face
2.
Synonyms: scoff , fleer, flout, gibe, gird, jeer, jest, quip (at), scout (at)
Related Word: belittle, detract, disparage, underrate
Idioms: cock a snook at, give the Bronx cheer to, give the raspberry, sneeze at, thumb one's nose at