chow down on
phr. v..phr. v.. to eat a lot of food quickly and with great enthusiasm.
phr. v.. to consume food vigorously or in large quantities; carries a highly informal, colloquial register often used in social or casual settings.
The kids chow down on pizza after their soccer game.
We found a great burger joint and spent the afternoon chowing down on fries and shakes.
While the guests were chowing down on the buffet, the host took the opportunity to make a surprise announcement.
highly informal; usually followed by a specific type of food as the object.
this is a great example of 'vivid' phrasal verbs; contrast it with 'eat' (neutral) and 'devour' (more intense/literary) to show how register changes based on the setting.
They chowed down the tacos.They chowed down on the tacos.the preposition 'on' is required when you mention the specific food being eaten.