Definition of hot diggety in English:

hot diggety

(also hot diggity, hot diggerty, hot diggedy)

exclamation

US
slang
  • = hot diggety dog.

Origin

1920s; earliest use found in Dialect Notes. Shortened from hot diggety dog.

Pronunciation

hot diggety

/ˌhɒt ˈdɪɡəti/