Sjur is an exottic
way of defining
people who have lived all their life in a backwater
farm community, and against all odds has grown intellectual sides (mostly in academical fields ((i.e math))).
Although having remarkable feats in the intellectual side, they often lack the social properties. And thus this can be used as both an insult or a compliment.
Aye, so I be sittin' 'round me table wi' all
ye lil' berks'n'
twas thinkin'
tae meself, "Boy! This 'ere lad be /so/ Sjur!" An' than I 'offed 'im wi' me chivs.