Meandering is basically the same as stippling but typical a large scale.
Serpentine is a stitch common on modern machines. Simply a wavy line of multiple stitches (as opposed to a zig zag which is just one stitch).
I used it for the first time on this quilt, I got a bit too excited and liked the peaks on my test fabric. By the time I used it with the jelly beans and realized it was too sharp and I wasn't so happy it was too late to change my mind. Oh well, there's always next time!
Quilt help needed, Soft n Crafty