n.

1. 滿口；一口；少量[C][（+of）]
   I took only a mouthful of food and then left.

   我只吃了一點兒東西就走了。

2. 【口】冗長而難念的字（或句）[S]
   That Russian name is really a mouthful.

   那個俄文名字真拗口。

3. 【口】重要的話；確切的話[S]

n.

1. a quantity of food or drink that fills or can be put in the mouth.
2. a long or complicated word or phrase.