muumuu

[ moo-moo ]
/ ˈmuˌmu /

noun

a long, loose-hanging dress, usually brightly colored or patterned, worn especially by Hawaiian women.
a similar dress worn as a housedress.

Origin of muumuu

First recorded in 1920–25, muumuu is from the Hawaiian word muʾumuʾu name of the dress, literally, cut-off; so called because it originally lacked a yoke