春蚓秋蛇[chūn yǐn qiū shé]
词典like spring worms and autumn snakes -- poor penmanship：春蚓秋蛇。
词典clumsy in calligraphy：春蚓秋蛇。
like spring worms and autumn snakes -- poor penmanship; clumsy in calligraphy （比喻书法不工）