The term 'blows off steam' is a phrase used to describe the act of releasing pent-up emotions or energy. This can be done in a variety of ways, such as through ranting, venting, or erupting. Ranting is an outburst of strong feelings expressed in an angry or emotional manner. Venting is the act of expressing one's feelings or frustrations in a controlled manner. Erupting is an explosive release of energy or emotion. All three of these activities are ways of blowing off steam and releasing built-up tension.