Moving something slightly with small, quick movements, especially with the fingers.
Sniggling can be sneaky or mischievous, like when someone is trying to grab a cookie without anyone noticing.
Examples:
She was sniggling the pen on the table.
Stop sniggling the remote control!
The cat was sniggling the yarn.
He's sniggling the last cookie from the jar.
The kids were sniggling the candies from the bowl.
I caught you sniggling the keys from my bag!