To rage, vent one's anger.
To spew saliva as foam.
To be on the point of breaking out into anger; to be agitated.
To cook or undergo heating slowly at or below the boiling point.
To cause to cook or to cause to undergo heating slowly at or below the boiling point.
To remain angry with someone or something past the point of exhaustion; to resign oneself to holding a grudge, especially after some failed attempts to resolve a situation.
To develop gradually, of an idea or plan.
The state or process of simmering.
Someone who plays a sim (a simulation game), particularly The Sims.