noun, noun or participle which takes 'suru'
A baseball/golf term for swinging with full power; also used figuratively for going all out.
バッターはフルスイングしたが、空振りに終わった。
The batter took a full swing but ended up striking out.
彼は仕事にフルスイングで取り組ん
He is tackling his work with full swing (giving it his all).