The phrase "spider legs" typically refers to long, thin, and spindly appendages resembling the legs of a spider.
Sentences with «spider legs»
Spoon the melted chocolate into the bag and use it draw spider legs on the sides of the chocolate chips. (tastesbetterfromscratch.com)
Students noticed that the scientific drawings showed spider legs of different shapes, which led them to discuss how those differences help spiders survive in their respective habitats. (ascd.org)
So once you've found the best mascara for your lashes, make sure you're applying it properly and you don't end up with lashes that look like dead spider legs. (style-yourself-confident.com)