垂涎欲滴

chuíxiányùdī
  1. to drool with desire (idiom); to envy
  2. to hunger for

CEDICT

to drool over; to yearn for (certain food or item)

Wiktionary

嘴馋的口水快要流下来，形容极贪馋。如：「这孩子放学回家，一见到点心就垂涎欲滴。」也作「馋涎欲滴」、「馋涎欲垂」。

重編國語辭典

嘴馋得口水快要流下来，形容极贪婪

維基詞典

Entry Composition

1 垂涎 chuíxián
  1. to drool; to salivate
  2. (fig.) to covet; to desire greedily
2 欲滴 yùdī
  1. (suffix) replete (with moisture)
  2. glistening
  3. plump and tender
  4. lovely
  5. alluring