The phrase "thanks for nothing" is often used sarcastically to express disappointment towards someone's lack of help or support. However, there are many synonyms that can provide more colorful language to convey the same message. Some alternatives include "great job, as always," "you really came through for me," or "I don't know what I'd do without you...oh wait, I do." These phrases add a level of humor and wit to the expression of frustration and are perfect for situations where a little bit of humor can lighten the mood.