The phrase "hung out with" is fairly colloquial in nature and describes spending time with someone in a casual setting. However, there are a variety of synonyms for this phrase that can be used to add more variety and color to your language. Some options include "chilled with," "kicked it with," "hung around with," "spent time with," "had a good time with," "went out with," and "socialized with." Each of these options conveys a slightly different nuance or tone, so it's important to consider which one best suits the situation you're describing.