"chug down" is correct and usable in written English.
You can use it when referring to the act of drinking a beverage quickly. For example, "We all chugged down our beers before heading to the next bar."
At home they greedily chug down a quart of amped-up babyccino.
It's amazing Joseph McCarthy didn't drag one of these melons in front of his Senate subcommittee, if not to force it to testify, then to chug down its contents.
The exhibit, organized by the Société Nationale des Chemins de Fer, will include the chance to see an SNCF train chug down the middle of the avenue on June 1.
He apparently did not think it worth mentioning that the boat's three 5,600 horsepower engines chug down about 1,000 gallons of fuel an hour at maximum cruising speed.
Shouldn't we rather be flying the flag for Prince Harry syndrome and underwear amnesia, proud of the tramp stamps and dolphin tattoos adorning our sunburnt bodies, happy to chug down discount cocktails and increase the load of the plane returning us to our rainy urban lives?
Home in my mittens to chug down a Hot Ribena.
But the only sound is a tractor chugging down long rows of Brussels sprouts that stretch away to the south.
Indeed, she was relentlessly peppy as she plunged into her double-portion salad and chugged down a cup of coffee.
The Canadians chugged down a couple of cases of canned beer — respecting the prohibition against glass bottles.
(And that she'd chugged down many a beer with Joe and Jane "six-pack" in an effort to woo white voters).
One hundred yards of chugging down a busy urban waterway and "otter!" shouted our friend Laura, and we passed within two metres of a happy-looking beast.
