The term "buzzed up" is often used when referring to someone who is under the influence of a drug or alcohol. However, there are many synonyms you can use instead of "buzzed up." For example, you could say someone is "intoxicated," "under the influence," or "tipsy." Other synonyms include "drunk," "blitzed," "hammered," "wasted," and "inebriated." If you want to be more subtle or diplomatic, you could say someone is "feeling a bit tipsy," "has had a few too many," or "is feeling the effects of alcohol." Regardless of what synonym you choose, it's important to remember that getting "buzzed up" can be dangerous and should be done responsibly.