Kevin O'Leary is known for his business acumen and blunt honesty. Too blunt, sometimes, as it turns out.

On Friday's episode of ABC's "Shark Tank," the longtime investor brought Raquel Graham, founder of Chicago-based apparel start-up Roq Innovation, to tears. "You're a crazy chicken," O'Leary told Graham, referring to her energetic personality. "I like crazy chickens."