Definition of mixy-matchy in US English:

mixy-matchy

adjective

US
informal
  • Especially of decor or clothing: characterized by mixing and matching; consisting of a blend of harmonious colours, patterns, styles, etc. Compare to mix and match.

Origin

1960s. From mix + -y + match + -y, after to mix and match and mix-and-match [noun].

Pronunciation

mixy-matchy

/ˌmɪksɪˈmatʃi/