When we say someone has been "fooled with," we mean they have been deceived or tricked. Some synonyms for this phrase include duped, hoodwinked, bamboozled, conned, or swindled. These words all convey the idea of someone being misled or cheated out of something. They imply dishonesty on the part of the person doing the fooling, and a certain amount of vulnerability or gullibility on the part of the victim. Being fooled with can feel humiliating, and it can be difficult to trust the person who deceived you afterward. It's always wise to be cautious and skeptical in situations where you suspect someone might be trying to fool you.