There are many synonyms for the phrase "waste time" that can be used to express the same sentiment in a different way. Some alternatives include "fritter away," "squander," "dilly-dally," "idle away," "fool around," and "procrastinate." Each of these phrases might be more applicable in different scenarios, depending on the context. For example, "dilly-dally" might be more appropriate to use when referring to someone who is delaying taking action, whereas "procrastinate" might be used to describe someone who habitually leaves tasks until the last minute. Regardless of the phrasing, the underlying message is the same: it is not productive to waste time.