Rumination about anger experiences prolongs anger arousal and increases the likelihood of aggression. School violence perpetrators have ruminated angrily. Research measures and personal accounts of anger rumination often contain revenge-planning as a subtheme, the relevance of which has received insufficient attention in accounting for aggressive behavior. This study differentially examines anger rumination with and without revenge-thinking, testing for their differential effects in association with aggression and life satisfaction. In a sample of 340 undergraduates, anger rumination (without revenge-thinking) was not significantly associated with self-reported physical or verbal aggression, while revenge-thinking was, controlling for gender and anger disposition. However, anger rumination, but not revenge-thinking, was associated with poorer life satisfaction. Relevant extensions for violence risk assessment, anger treatment, and future research concerning anger rumination are discussed.