interjection
boisterous laughter; bahaha; bwahaha
Onomatopoeic interjection for loud, hearty, often rough or masculine laughter. Used in casual, informal contexts.
彼はがははと大笑いした。
He burst out laughing with a loud 'gahaha'.
漫画の悪役が「ガハハ！」と笑う。
The villain in the manga laughs 'gahaha!'.
Onomatopoeic formation from the sound of loud laughter. The exact origin is uncertain.