unco adjective 2adverb 1forms 2 adjective2 •(Australia, slang) Uncoordinated.‘Aren′t he the most unco kid you ever come across?’ Norm refused to have Kevin on his boat even if he begged to be taken because he was too clumsy. — 2006 •(Scotland) Strange, weird.And the second quean was Hope and she was near as unco as Faith, but had right bonny hair, red hair, though maybe you'd call it auburn […]. — 1932 adverb1 •(UK, Scotland) Very.‘Ye should tear up this carpet, Robbie,’ Uncle Peter called back over his shoulder. ‘It's most unco wearisome when a body′s leg-weary.’ — 1920 formsmore unco · most unco