Flimflammery is a fun word to say and it means deceitful or fraudulent behavior. If you're talking about someone who is trying to pull a fast one, you might say they're engaging in flimflammery. There are plenty of synonyms for this word, such as trickery, chicanery, shenanigans, or charlatanism. Other similar words include swindling, duplicity, or deceitfulness. These words all have slightly different connotations, but they all describe someone who is being dishonest or deceitful in some way. Next time you encounter someone engaging in flimflammery, try using one of these synonyms and impress your friends with your vocabulary skills.