adjective

nervously awkward and ungainly.

a gawky teenager

awkward,ungainly,inelegant,graceless,ungraceful,gauche,maladroit,inept,bumbling,blundering,lumbering,socially awkward,socially unsure,unpolished,unsophisticated,uncultured,uncultivated,unworldly,nervous,shy,bashful,nervy