Spanish:
English: You talk like you have a potato in your mouth.
collected: Flushing Meadows – Corona Park, Queens (6-4-2016)
origin: something you say to or about someone who is acting posh or speaking fancifully. Referencing an accent or affect of speech common among the upper class in Mexico.

Spanish:
English: You’re speaking like you have a potato in your mouth.
collected: Flushing Meadows – Corona Park, Queens (6-4-2016)
origin: a common insult from Columbia that is used when someone is mumbling, or speaking in a way you can’t understand.