yap /jap 
/ ▸ verb ( yaps, yapping, yapped)
[no object] give a sharp, shrill bark: the dachshunds yapped at his heels.
▪ informal talk at length in an irritating manner: he sat in a coffee shop yapping with his buddies.
▸ noun 1 a sharp, shrill bark: frenzied yaps of delight.
2 North American English informal a person's mouth: he should keep his yap shut.
▪ [mass noun] loud, irritating talk: she'll give you a lot of yap.
– ORIGIN early 17th century (denoting a dog that yaps): imitative.
EnglishOxford Dictionary of English
