passive-aggressive

[laceyl]

Function: adjective: being, marked by, or displaying behavior characterized by expression of negative feelings, resentment, and aggression in an unassertive way (as through procrastination, stubbornness, and unwillingness to communicate)
a passive-aggressive personality
-passive-aggressively adverb

Source: Merriam-Webster Medical Dictionary, © 2002 Merriam-Webster, Inc.