noun
leftist; left-winger
Derogatory internet slang blending 不細工 (busai, 'ugly') and 左翼 (sayoku, 'left wing'), implying that leftists are unattractive or contemptible. Used almost exclusively in online political discourse.
ネットで「ブサヨ」って言葉をよく見かけるけど、あまりいい意味じゃないよね。
I often see the word 'busayo' online, but it's not really a nice term, is it?
彼は反対意見の人をすぐブサヨ呼ばわりする。
He quickly labels anyone with a different opinion a 'busayo'.