The phrase "raised a rumpus" means to cause a commotion or uproar. Some synonyms for this phrase could include "stir up trouble," "make a fuss," "create a disturbance," "kick up a storm," or "cause a scene." Other similar phrases might include "raise hell," "make waves," "rock the boat," or "stir the pot." These expressions all convey a sense of someone actively causing chaos or disruption, often in a heated or confrontational manner. Depending on the context, they could be used to describe anything from a playful prank to a full-blown protest or riot.