What is another word for feeling up?
Pronunciation: [fˈiːlɪŋ ˈʌp] (IPA) 
"Feeling up" is a commonly used slang term that refers to feeling good, energized, or even sexually aroused. There are plenty of synonyms to this phrase including "feeling great," "feeling high," "feeling euphoric," "feeling elated," "feeling thrilled," or even "feeling on top of the world." Other synonyms may include more casual terms like "feeling jazzed," "feeling pumped," or "feeling psyched." Depending on the context, feeling up can be positive or negative, but the person's experience of increased sensory awareness will still be felt. Regardless of which phrase you prefer to use, feeling up is a sensation that everyone experiences at some point, whether it be emotionally or physically.
