"Chumped" is a slang term that typically refers to being tricked or deceived. There are several synonymous phrases that can be used to express the same idea. For example, "duped," "swindled," "hoodwinked," "bamboozled," and "taken for a ride" are all phrases that can be substituted for "chumped" in most cases. Other synonyms for "chumped" might include "conned," "scammed," "fooled," or "deceived". Regardless of the specific term used, it's important to be aware of the potential for deception in any situation and to approach all interactions with a healthy dose of skepticism.