na-adjective, noun
very unskillful; extremely awkward; terrible at
Colloquial and emphatic; ド is an intensifying prefix. Often used self-deprecatingly or in casual criticism.
See also: ド
私は料理がド下手だ。
I'm terrible at cooking.
彼の絵はド下手だけど、味がある。
His drawings are really clumsy, but they have character.
下手 means 'unskillful' or 'poor at'; ド下手 adds strong emphasis, like 'really terrible'.
Prefix ド intensifies the following word, often with a casual or slangy tone.
Compound of intensifying prefix ド (do) and 下手 (heta, 'unskillful'). The prefix ド likely derives from 度 (do, 'degree') or is a sound-symbolic intensifier.