expression, noun which may take the genitive case particle 'no'
unnecessary; better off without; can be dispensed with
Fixed expression meaning something is not needed or would be better absent. Often used as a modifier before nouns (adj-no) or as a standalone comment. Has a slightly literary or emphatic feel.
See also: なくてもよい
そんな説明は無くもがなだ。
That kind of explanation is unnecessary.
彼の無くもがなの一言が場をしらけさせた。
His unnecessary remark killed the mood.