Real Dictionary

yap
verb: If a small dog yaps, it makes short loud sounds in an excited way.
verb: If you say that someone yaps, you mean that they talk continuously in an annoying way.

Yap in American English
a sharp, shrill bark or yelp
group of islands in the W Caroline Islands, W Pacific; part of Micronesia: 39 sq mi (101 sq km)
to make a sharp, shrill bark or yelp
intransitive verb: to bark sharply, shrilly, or snappishly; yelp
noun: a sharp, shrill, or snappish bark; yelp
transitive verb: to utter by yapping

yap in British English
noun: a group of four main islands in the W Pacific, in the W Caroline Islands: administratively a district of the US Trust Territory of the Pacific Islands from 1947; became self-governing in 1979 as part of the Federated States of Micronesia; important Japane
noun: a high-pitched or sharp bark; yelp
verb: (of a dog) to bark in quick sharp bursts; yelp