The view that frustration, or failure to reach a certain desired goal due to circumstance, often leads to aggression, or behavior which intends harm.
Example: According to this hypothesis, after a football game fans of the losing team are more likely to feel aggressive and/or carry out aggressive actions than fans of the winning team.
Grinnell, R. (2009). Frustration-Aggression Hypothesis. Psych Central. Retrieved on September 3, 2015, from http://psychcentral.com/encyclopedia/2009/frustration-aggression-hypothesis/