Passive-aggressive behavior

Passive-aggressive behavior is the indirect expression of hostility, such as through procrastination, stubbornness, sullen behavior, or deliberate or repeated failure to accomplish requested tasks for which one is (often explicitly) responsible.

For research purposes, the Diagnostic and Statistical Manual of Mental Disorders (DSM) revision IV describes passive-aggressive personality disorder as a "pervasive pattern of negativistic attitudes and passive resistance to demands for adequate performance in social and occupational situations."