[牛仔用语]踢马刺

a pair of riding boots with pothooks

一双带踢马刺的马靴

写得十分潦草的字迹，笔迹潦草

You wrote me a letter full of pothooks, so I couldn't even read it.

你给我写了封信，满纸字迹潦草，我都没法看懂。