Blow your top Definition 1 of 1Pro Tip 1/3Emotional Intensity Use 'blow your top' to express strong, uncontrollable anger, not mild irritation. She blew her top when the flight got canceled again. Pro Tip 2/3Informal Context 'Blow your top' is informal and best used in casual conversations or expressive writing. My dad's going to blow his top if we come home past curfew. Pro Tip 3/3Visual Imagery The phrase creates an image of a volcano erupting, linked to explosive anger. Watch out, he's about to blow his top over the lost package!