"Excite-moi!"
This is the imperative form of the verb "exciter" (to excite), conjugated in the second-person singular (you) in the informal "tu" form.
However, depending on the context, you might use other expressions:
* "Donne-moi envie de..." (Give me the desire to...) followed by the action you want to be excited about.
* "Mets-moi en appétit" (Get me excited) for something that you're anticipating.
* "Tiens-moi au courant" (Keep me informed) if you want to be updated on something exciting.
The best way to choose the right phrase depends on the specific situation and the level of formality.