The term 'Nasty Look' can be described by three crossword solutions: SNEER (5 letters), LEER (4 letters), and GLARE (5 letters). A SNEER is a facial expression of contempt or scorn, often accompanied by a curled lip. A LEER is a suggestive, knowing look, usually with a hint of malice or lewdness. A GLARE is an intense, angry look, usually with narrowed eyes. All three expressions are considered to be unpleasant and hostile.