An ogre is a huge, tall human like, fictional creature. They are known to be scary and evil. The word Ogre is French. It was first used was by French poet Chrétien de Troyes. He used it in his verse Perceval, the Story of the Grail.
When it first started out, they were always shown as big evil creatures in fictional settings that attacked and troubled humans and other beings. They got so popular that many evil people of the past have been called ogres. It’s also sometimes used in modern days. As time passed by, some ogres have been depicted as nice friendly characters.