yap yap /ˈjæp/

noun

1. Informal terms for the mouth  ( cakehole , gob , hole , maw , trap , yap )
   informal terms for the mouth
   

verb

1. () Bark in a high-pitched tone  ( yip , yap , yelp )
   bark in a high-pitched tone
    The puppies yelped
   the puppies yelped