1
general::
Phrase(s): belt a drink down
Fig. to drink an alcoholic drink rapidly. (See also belt someone or something down.) • She belted a couple of drinks down and went out to face her guests. • How many drinks did Gloria belt down?, Phrase(s): belt someone or something down
to secure someone or something with a belt or strap. • Please belt the child’s seat down and put the child in it. • Did you belt down the kids?
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Swallow very quickly, as in After the race, he belted down a whole quart of water. This phrase is frequently used for guzzling whiskey or some other liquor. [Slang; mid-1800s]
American Heritage Idioms