When it comes to describing the act of crying or complaining, there are endless synonyms that could be used instead of "boo booing". Some alternative phrases might include "whining", "moaning", "bawling", "howling", or "sniveling". Similarly, someone who is "boo booing" could also be described as "sniffling", "wailing", "weeping", or "sobbing". Ultimately, the choice of synonym will depend on the context and tone of the situation. Whether a child is upset about a scraped knee or an adult is venting frustration, there are plenty of ways to express the same emotion without resorting to the same old cliche.