1.Definition: characterized by obscenity

Related Adjective(s):cruddy, filthy, foul, smutty

2.Definition: disgustingly dirty; filled or smeared with offensive matter

"A nasty pigsty of a room"

Related Adjective(s):filthy, foul

3.Definition: exasperatingly difficult to handle or circumvent

"A nasty problem"

Related Adjective(s):tight

4.Definition: offensive or even (of persons) malicious

"In a nasty mood", "A nasty accident", "A nasty shock", "A nasty smell", "A nasty trick to pull", "Will he say nasty things at my funeral?"

Related Adjective(s):awful