The phrase "making up as goes along" implies that someone is doing something without a plan or preconceived idea. Some synonyms for this phrase include "winging it," "improvising," "ad-libbing," "inventing on the spot," and "flying by the seat of one's pants." These terms convey a sense of spontaneity, creativity, and adaptability, but can also suggest a lack of preparation and foresight. People who are skilled at making up as they go along may be described as resourceful, quick-witted, and flexible, while those who struggle with this approach may be seen as disorganized, scatterbrained, or unreliable.