Definition of antsy-pantsy in English:

antsy-pantsy

adjective

US
informal
  • Antsy. Compare to have ants in one's pants.

Origin

1940s. Apparently from antsy (although this is first attested slightly later) + pants + -y (as a rhyming pair), probably after to have ants in one's pants.

Pronunciation

antsy-pantsy

/ˌan(t)siˈpan(t)si/