the.com/whipstitch

means A simple hand or machine sewing stitch that loops diagonally over an edge to bind it and stop fabric from fraying.

from Straightforward compound of 'whip' and 'stitch' — the 'whip' refers to the quick, lashing, over-and-over motion of the needle as it wraps around an edge, the same sense of 'whip' found in phrases like 'whip something into shape.' The term dates to the era of hand-sewing basics, naming exactly what the hand does: flick the thread over, again and again, fast as a whip.