Rabbit-mouthed (adj.): a condition in which a person's otherwise normal and even attractive features are obscured by an overly wide mouth with thin lips, causing the person to speak as if he/she had the mouth of a rabbit.

• Jon Hamm
• Jake Gyllenhaal
• Tobey Maguire
• Jamie Lee Curtis [okay, she's not a man, but she's got some serious rabbit mouth going on]
• Christian Bale
• Jamie Bamber
• Michael Fassbender