I was chatting with Amy and she described a woman as "dippy." But due to a bad cell connection, I heard it as "gippy" with a "g" which led to a long convoluted discussion. But we decided we should try to introduce it into our modern lexicon. Gippy (adj) - Jittery feeling which may result from a caffeine rush or sugar high
Example: Man, am I feeling "gippy" after two cappuccinos!