n.[C]

1. （母鸡）咯咯的叫声
2. 【美】【俚】呆子，笨蛋

vi.

1. （母鸡）发咯咯声唤小鸡

vt.

1. 发咯咯声呼唤（或表示）
   cluck one's disapproval

   啧啧地表示反对

v.

1. (of a hen) make a short, low sound.
2. (cluck over/around) express fussy concern about.

n.

1. the short, low sound made by a hen.
2. N. Amer. informal a foolish person.