Sidelong

She gave him a sidelong glance all throughout the lecture.

He cast me a sidelong glance.

She made some sidelong remarks about his manhood.

The passenger train was signalled from one of the west end bay platforms along the Down South Line; as it passed through a crossover to the Up South Line the freight train, which had been travelling slowly to the Up South Line, over-ran the signal protecting the crossover and came into sidelong collision with it.