Alrighty American Canada humorous interjection informal
Used when somebody agrees with an idea or something with others, or wants to end a conversation
Alrighty, let's do it!
Alrighty, I'll talk to you later.
"Alrighty" is actually a colloquial variant of "alright" ( considered non-standard of "all right"). It might appear elsewhere in the United States in the early 1900s, becoming a widespread slang in college at some point.