"beak or bill of a bird," Old English nebb "beak, nose; face, countenance; beak-shaped thing," common Germanic (cf. Old Norse nef "beak, nose," Middle Dutch nebbe "beak," Old High German snabul, German Schnabel "beak," Old Frisian snavel "mouth"), of uncertain origin.
A person without charm, interesting qualities, talent, etc; wimp: ''Nebbish'' is simply the one in the crowd that you always forget to introduce/ Don't be a nebbish/ poor little nebs like Julian
[1941+; fr Yiddish fr Czech neboky]