Be out of your tree Definition 1 of 1Pro Tip 1/3Connotation Expresses strong disbelief or amazement at someone's actions or ideas. He's out of his tree for trying to skateboard off the roof! Pro Tip 2/3Not Literal Used figuratively; it doesn't mean someone is physically in a tree. She puts ketchup on everything, even ice cream – she's out of her tree! Pro Tip 3/3Casual Use Typically used in informal situations among friends or peers. You're out of your tree if you think that's the correct answer.