The phrase "was up clouds" is an informal greeting that may be used between two individuals who enjoy spending time with each other. However, if you are looking for synonyms for this phrase, there are several options. For instance, you might use the phrase "hey there" or "what's good" to greet someone in a similar fashion. Another option might be to say "what's happening" or "what's cracking." Depending on the situation, you may prefer to use a more formal greeting, such as "hello" or "good morning." Ultimately, the phrase you choose will depend on your personal preference and the nature of the relationship between you and the person you are greeting.