Definition of yakking:
(n) :
An ox-like mammal native to the Himalayas, Mongolia, Myanmar, and Tibet with dark, long, and silky hair, a horse-like tail, and a full, bushy mane.
(v) :
(slang, intransitive) To talk, particularly informally but persistently; to chatter or prattle.
(v) :
(slang, intransitive) To vomit, usually as a result of excessive alcohol consumption.
(n) :
(slang) A talk, particular an informal talk; chattering; gossip.
(n) :
(slang) Vomit.
(n) :
(slang) A laugh.