(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.

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

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

(travel industry) The time between high and low season in a travel market, or, if the market is divided into four segments, the time just below high season.

Someone who engages in shoulder surfing.

plural of shoulder surfer

To engage in shoulder surfing.

To disrespect someone, especially by ignoring them.

plural of cold shoulder

(idiomatic) A deliberate act of disrespect; a slight or snub