1. The mouth, especially when considered as a place where food is put.
Usage: British informal; often used in the phrase 'shut your cakehole' as a rude way to tell someone to be quiet
2. A small opening or compartment in a wall or structure, historically used for passing food or goods through.
Usage: archaic; British

Examples

• He told his brother to shut his cakehole during the movie.
• Stop complaining and close your cakehole for once.
• The baker used the cakehole in the wall to pass fresh bread to customers outside.
• She stuffed another piece of cake in her cakehole without hesitation.
• Shut your cakehole and listen to what I'm saying.