noun
Refers to a sudden outburst of anger, often used in the phrase かんしゃく玉を破裂させる (to explode in anger).
彼はちょっとしたことでかんしゃく玉を破裂させた。
He exploded in anger over a trivial matter.
noun
A small novelty firework that pops when thrown on the ground; also known as a 'party snap' or 'throwdown'.
子供たちはかんしゃく玉を地面に投げて遊んだ。
The children played by throwing bang snaps on the ground.
癇癪 is the general word for 'tantrum' or 'irritability', while かんしゃく玉 specifically refers to a fit of anger or the firework.
Compound of 癇癪 (かんしゃく, 'tantrum') + 玉 (たま, 'ball'). The firework sense likely derives from the explosive nature of a tantrum.