Hello! "Happy-go-skippy" isn't a word that many people use, and appears to be "made up" / invented for the purpose of a comedic moment within the TV show you watched. It appears to be an exaggeration of a commonly-used phrase, "happy-go-lucky", which means "not worried about anything; not concerned; very casual; care-free." I believe that "happy-go-skippy", as you heard it, was a humorous way for the character to express the qualities of their personality and the level of joy they experience in their life. The character has such a delightful, positive, winning personality; and care-free attitude towards life, that it inspires him/her to literally skip in happiness or jump for joy! Someone who is so pleasant to be around that they are easy to get along with; someone who anyone would want to become friends with. Picture a person so excited about life, that they can barely stand still; someone who may be happy that they smile all the time and whistle a happy tune!

The expression is based on "happy-go-lucky", which means a person is cheerful and not worried about anything. The speaker used "skippy" (literally from "to skip") and now the phrase sounds even more cute and comical. Whoever translated it tried to use an analogy because a literal translation wouldn't have worked, but maybe the result is off the mark.