This is the 14973rd most frequent German word.
schluckt
"Schluckt" means "swallows" in English.
Here, 'schluckt' is used in its literal sense implying the act of swallowing food by the dog.
Der Hund schluckt schnell sein Futter.
The dog swallows its food quickly.
Here, 'schluckt' takes on a figurative meaning, describing the high consumption rate of gasoline by the car.
Das alte Auto schluckt viel Benzin.
The old car consumes a lot of gas.
In this case, 'schluckt' is used metaphorically to describe the act of suppressing emotions or feelings, in this instance, disappointment.