A "dilly-dallier" is someone who wastes time or procrastinates. There are several synonyms for this word, including "dawdler," "loiterer," "slowpoke," "laggard," "slacker," and "idler." Each of these words carries a slightly different connotation. For example, a "dawdler" implies someone who is slow and inefficient, while a "loiterer" suggests someone who is hanging around without a clear purpose. A "slowpoke" is simply slow-moving, while a "laggard" may be falling behind others. A "slacker" implies laziness and a lack of motivation, while an "idler" suggests someone who is just passing time without any particular goal. Regardless of the specific synonym used, all of these words describe someone who is wasting time when they could be more productive.