High (vs. low) levels of boredom are associated with greater (vs. lesser) impulsiveness. It is important to examine the psychological processes that link boredom and impulsiveness to understand this relationship. We propose that heightened impulsiveness in response to boredom partly stems from people's attempts to deal with meaninglessness when bored. In Studies 1-2, we found that perceived meaninglessness, characteristic of boredom, mediated the relationship between boredom and impulsiveness. In Study 3, we additionally hypothesized that self-awareness serves as a catalyst of boredom-induced impulsiveness by highlighting meaninglessness. Accordingly, Study 3 showed that manipulated boredom promoted impulsiveness through meaninglessness, particularly at greater levels of self-awareness. These studies support our hypothesis that impulsiveness is a response to boredom and the meaninglessness that boredom signals.