What is "sniggers"

Usage examples of "sniggers".

No sniggers had reached her ears in the corridors and not one of her projects had been ruined.

And in so doing, in earning his gratitude, in stilling the sniggers of the assembled gongs‑and‑pips, I created a new father for myself.

She said nothing, and Reynolds could hear the stifled sniggers behind him as he sat down.

Everybody, he knew, was looking at him, and when he pulled his coat collar up and his hat brim down, a renewed chorus of sniggers broke out.