Every Saturday I'll give you a couple of idioms to learn. An idiom is a saying or phrase whose meaning cannot be taken from the literal meanings of the words.
get off one’s high horse: to stop being arrogant, to begin to be humble and agreeable
Maybe more people would like Sam if he got off his high horse, instead of boasting about how much money he has.
go ape: to go crazy or act wildly with excitement; get agitated
The children went ape as soon as they reached the playground, and ran excitedly from one piece of equipment to the other.