yap

1. The high-pitched bark of a small dog, or similar. (countable)
2. Casual talk; chatter. (slang, uncountable)
3. The mouth, which produces speech. (countable, slang) · Shut your yap!
4. A badly behaved person, especially a child. (countable)
5. A fool. (countable, dated, slang, uncountable)

Plural yaps