Did you possibly mean one of these? Yiddish, giddily, girlish
Definitions
Century Dictionary and Cyclopedia
Examples
“Not only could I take it, but I guess I caused the troop to be a lot more giddish and immature.”
“Mrs. CookieMom didn't like the fact that the girls were giddish and immature (again .. "my fault").”
“(It was a long time ago ... so I'm not really clear on quotes) She said that she was sick of the troop when we're giddish and immature, and she hates it when people interrupt her, and the meetings never run smoothly because she never gets the chance to talk.”
Lists
These user-created lists contain the word ‘giddish’.
-
More Adjectival Arcana
List of adjectives such as everduring that do not frequent common speech and writing. A continuation of my list Adjectival Arcana, which had grown to over 7700 words and had become far too cumbersome.
transpontine, fetichistic, everduring, tachygraphic, tachygraphical, holographic, holographical, spectrobolographic, autographic, chirographal, autographal, ipsographic and 1419 more...
Tweets
Looking for tweets for giddish.

Dr.Poe giddish: To be in a state of uncontrollable giggling, foolishly happy. Oct 29, 2012