also: りょうとうつかい
noun
two-sword fencing; two-sword fencer
Refers to the martial art of using two swords simultaneously (e.g., katana and wakizashi) or a person who practices it. Often associated with Miyamoto Musashi's nitōryū.
See also: 使い
宮本武蔵は有名な両刀使いだった。
Miyamoto Musashi was a famous two-sword fencer.
noun
being skilled in two fields; expert in two fields
Metaphorical extension from sword fighting: a person who excels in two different areas, e.g., sports and academics, or two professions.
彼は医者でありながら弁護士でもある、まさに両刀使いだ。
He is both a doctor and a lawyer—truly a person skilled in two fields.
noun
liking both alcohol and sweets; person who likes both alcohol and sweets
Colloquial, often humorous: someone who enjoys both drinking and eating sweets, rather than preferring one over the other.
彼女は酒もケーキも大好きな両刀使いだ。
She's a person who loves both alcohol and cake.
noun
Slang, colloquial. Refers to a person who is attracted to both men and women. May be considered informal or jocular.
彼は両刀使いだって噂だよ。
Rumor has it he's bisexual.