The phrase "don't give me that" is commonly used to reject someone's explanation or excuse as not being genuine. However, if you're looking to spice up your vocabulary, there are plenty of synonyms that can be used in its place. For instance, you could say "stop trying to pull the wool over my eyes," "cut the crap," or "that dog won't hunt." Other alternatives include "spare me," "save it," "enough already," and "you can't fool me." Whatever you choose to say, remember that the tone and context can greatly impact your message, so use these synonyms with caution and intention.