Pop one's cork is a phrase that means losing one's temper or getting angry. There are many synonyms that can be used in place of this phrase. Some of these include losing one's cool, flipping out, blowing a fuse, going ballistic, getting heated, becoming enraged, boiling over, hitting the roof, and flying off the handle. All of these phrases refer to the same concept; somebody becoming very angry or losing their temper. While these phrases may have slightly different connotations, they can all be used interchangeably to convey the same idea. Whether you're writing an angry email or trying to describe someone's temper tantrum, these synonyms are a useful way to spice up your language.