Boohoo/ˌbuːˈhuː/ Definition 1 of 3Pro Tip 1/3Mockery Tone Used to imitate crying in a sarcastic way to mock someone's complaint or sadness. "Boohoo, you have to wake up early for work," she teased. Pro Tip 2/3Emotion Exaggeration Sometimes emphasizes the intensity of emotion, whether real or pretend. He said 'boohoo' with a pout, exaggerating his distress. Pro Tip 3/3Informal Considered very casual, mostly used in informal conversations among friends. They all laughed and said, 'Boohoo, so sad!' after the minor mishap.