/jæk; jæk/
v [I, Ipr, Ip] ~ (away/on) (about sb/sth) (sl 俚) talk continuously and often noisily (usu about sth unimportant) 唠唠叨叨, 闲扯（常为高声地）
*Joy kept yacking (on) about the wedding. 乔伊唠唠叨叨地聊着婚礼的事.

n (usu sing 通常作单数) (sl 俚) persistent or trivial conversation; chatter 絮絮叨叨的谈话; 聊天; 唠叨
*having a good old yack with the neighbours 与邻居痛快地闲扯往事.