喏喏連聲 [－－连声]

Jyutping je5 je5 lin4 seng1
Pinyin nuò nuò lián shēng

Definitions (Wiktionary)
  1. phrase, idiomatic
    to mumble assent; to shout out "Aye! Aye!"
    (syn.) 诺诺连声, 諾諾連聲