2.A mispronunciation to the word world,that happens to be used by some songwriters to make it rhyme with the word girl.Not necessarily trashy artists have used it.
A severely idiotic, toxic person who is hated by almost everyone that knows them due to their assholishness and immaturity. They are also incapable of fixing themselves and will make up excuses like "I'm disabled" or "I'm only age", so don't even bother trying to talk sense into them. Whirls are not to be trusted, as they could leak secrets you trusted them to keep or raid your Discord server out of sheer boredom.