There are a plethora of synonyms for the phrase "pissing moan about." Some options include complaining, criticizing, whining, grumbling, griping, bitching, moaning, grousing, bellyaching, and kvetching. While these terms all amount to a similar concept of griping about something, they may be used in different contexts depending on the severity and type of complaint. Ultimately, these words all have negative connotations and indicate a level of dissatisfaction or discontent with a situation or circumstance. It's essential to approach situations with a positive mindset and try to find solutions rather than getting caught up in the negativity of complaining.