2. a very violent or tense person
3. an area of countries with high nationalism and low tolerence for neighboring countries
2. She's a powder keg ready to explode
3. the balkan region was a powder keg at the turn of the 20th century
ben: "this is a powderkeg, im getting the hell out of here."
Troy: Vigus just barfed in the sink...you were right he totally powder kegged.