"Beat a ruffle" is a colloquial expression that means to cause a disturbance or stir up trouble. There are a number of synonyms that can be used to replace this phrase, depending on the context of the situation. Some common words that could be used in place of "beat a ruffle" include "cause a commotion," "create a disturbance," "raise a racket," "stir up trouble," and "start a fuss." Other variations might include "make a scene," "create an uproar," or "incite a disturbance." Whatever phrase is chosen, the key is to convey the sense of agitation or disruption that the original phrase implies.