From Longman Dictionary of Contemporary Englishsidelong look/glancesidelong look/glanceSIDEa way of looking at someone by moving your eyes to the side, especially so that it seems secret, dishonest, or disapproving He gave Oliver a sidelong glance. → sidelong
Examples from the Corpus
sidelong look/glance• She cast a sidelong glance at Fen.• Afterwards, in the changing room, everyone shoots sidelong glances at Lil.• But a few sidelong glances revealed them to be He-Shes.• Pleased faces, sidelong glances seeking agreement.• I cast a sidelong glance, to see if she's noticed. 