na-adjective, noun
blunder; clumsy mistake; goof
Colloquial term for a careless mistake or clumsiness. Often used self-deprecatingly or to tease someone lightly.
またドジをやっちゃった。
I messed up again.
彼はドジなところがあるけど、憎めない。
He can be clumsy, but you can't hate him for it.
The origin is uncertain. It may be related to the mimetic word どじどじ (flustered, confused), but the exact derivation is unclear.