"belted down" is a correct and usable phrase in written English.
It is an informal phrase that means to eat something quickly or to eat a lot of something quickly. For example, you can say, "He belted down his dinner in record time."
At Soundwave in 2007, the rain belted down and we moshed to Carrion so hard that steam poured off the pit.
When he finally turns up around 6.30pm, he looks even more dishevelled than usual, having "belted down from Belfast" in under two hours.
It was mid-afternoon in August but the floodlights at Goodison were already burning full on as the rain belted down from a sky as bruised as some of the players would be an hour and a half later.
He was joined by Alejandro Valverde but their brief foray had all the impact of a gelato melting in the 30-degree heat that belted down on the Jura.
A belted down jacket in a red and black check, and a patent-finish version in black stood out.
They chatted briefly and parted but, instead of cycling home, my dad belted down the road to the next station, swanned on to the train and, remembering that all's fair in love and war, joined his pal and the pretty stranger.
10.57pm BST The rain is really belting down at Augusta, but Jason Day will be feeling fairly sunny.
I can see you drifting into a bar, belting down a few, turning around to a guy on the stool next to you — a contemporary billboard baron from Podunk, Iowa — and saying, "Well, what do you think about old Leonidas?".
3.40pm GMT The rain is really bucketing down now It looks fairly unlikely that we'll get any more play today because there's probably only half an hour of time remaining and it's belting down at Centurion.
I can see you drifting into a bar, belting down a few, turning around to a guy on the stool next to you — a contemporary billboard baron from Podunk, Iowa — and saying, "Well, what do you think about old Leonidas?"..
But you've almost certainly never approached such velocity – nor wanted to – strapped onto skis belting down a mountain.
