Wiktionary
vb. 1 (context idiomatic English) To scold 2 To wear casual or informal clothes
WordNet
v. censure severely or angrily; "The mother scolded the child for entering a stranger's car"; "The deputy ragged the Prime Minister"; "The customer dressed down the waiter for bringing cold soup" [syn: call on the carpet, rebuke, rag, trounce, reproof, lecture, reprimand, jaw, call down, scold, chide, berate, bawl out, remonstrate, chew out, chew up, have words, lambaste, lambast]
put on clothes that make a careless or ill-dressed impression [syn: underdress] [ant: dress up]
Usage examples of "dress down".
He jerked the dress down, letting it pool on the floor around my feet.
Barrie was seized by a mixture of shyness and uneasiness as he stripped the dress down her hips and legs, then tossed it aside.
Nynaeve had to remove the bracelet in order for them to slide Elayne's gray-dyed dress down the leash and over Seta's head.
She refused to understand that a Warder just did not dress down her Aes Sedai.
As he peeled her dress down toward her hips, she unzipped his pants and pushed them over his incredible rear end.