(idiomatic) To a considerable degree. / By force; violently.

Either of the large flat bones at the back of the shoulder.

(intransitive, Canada, US) To look backwards over one's shoulder while driving or biking, before changing lanes or making a turn, to see if any vehicles are in one's blind spots.

A verge to the side of a highway, which should be used only in case of an emergency (especially on a motorway)

(Canada, US) An instance of looking backwards over one's shoulder while driving or biking, before changing lanes or making a turn, to see if any vehicles are in one's blind spots.

(chiefly computer security) The use of direct observation, such as looking over someone's shoulder at an ATM, in order to obtain information.

(of a garment) Not covering the shoulders.

To engage in shoulder surfing.

plural of shoulder surfer

Someone who engages in shoulder surfing.