His homework was very sloppy, with corrections scribbled all over.

sloppy 是形容词，由动词 slop（泼洒、溢出）加上形容词后缀 -py 构成，本义是"像被泼洒过一样凌乱的"，引申为"马虎的、潦草的"，形容书写或工作不认真、不整洁的样子。