I think you might mean 'uvula', which is a part of the oropharynx (in the back of the mouth) that hangs down from the roof of the mouth(soft palate). It's important in the articulation of sounds.
Two things that are needed to prevent food from entering airways are the uvela and the epiglottis. The uvela prevents food from entering the nasal cavity and the epiglottis closes off the trachea so food will go down the esophagus.
it is called the uvela. It wiggles round when you cry, yell or shout...
Try drinking alot of water or any other drink.That should get the food off.
Examples of collective nouns that start with the letter U are:an ubiquity of sparrowsan unction of undertakersan undulation or hillsan unkindness of ravens