Dirt

Dirt

(source)

Dirt derives from a reordering of the sounds in Middle English drit/drytt ("mud, dirt, dung") in the 15th century. Drit/drytt comes from Old Norse drit, though Old English dritan ("to void excrement") is a close relative. Both words derive from Proto-Germanic *dritanan. Calling someone dirt as an insult dates from the 1300's.